UWP build not compiling

I have a brand new installation of Unity 2019.3.0a2 and Visual Studio 2017 Community Edition. I build an empty scene in Unity against Universal Windows Platform, x64, D3D project, Target SDK 10.0.14393.0, Release Build. It build fine in Unity so I open the solution in Visual Studio and try build it after cleaning it but get the following issues:

1>------ Build started: Project: UnityEngine.TestRunner.Player, Configuration: Release x64 ------
2>------ Build started: Project: Unity.TextMeshPro.Player, Configuration: Release x64 ------
3>------ Build started: Project: Unity.Analytics.DataPrivacy.Player, Configuration: Release x64 ------
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\TestExtensions.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\Vector4EqualityComparer.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\MonoBehaviourTest\IMonoBehaviourTest.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Commands\EnumerableSetUpTearDownCommand.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\AssemblyInfo.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Assertions\UnityTestTimeoutException.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\AssemblyProvider\IAssemblyWrapper.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Runner\CoroutineTestWorkItem.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\TestRunner\RemoteHelpers\PlayerConnectionMessageIds.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\TestResultExtensions.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\ActionDelegator.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\TestRunner\RemoteHelpers\RemoteTestData.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Assertions\AllocatingGCMemoryConstraint.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Runner\DefaultTestWorkItem.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\UnityTestAssemblyBuilder.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Commands\EnumerableTestMethodCommand.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\AssemblyProvider\IScriptingRuntimeProxy.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Attributes\TestEnumerator.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Assertions\ConstraintsExtensions.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\TestRunner\RemoteHelpers\RemoteTestResultData.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\MonoBehaviourTest\MonoBehaviourTest.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Runner\FailCommand.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Commands\ImmediateEnumerableCommand.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\AssemblyProvider\ITestAssemblyProvider.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\TestRunner\RemoteHelpers\RemoteTestResultDataFactory.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Assertions\InvalidSignatureException.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Attributes\UnityCombinatorialStrategy.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Runner\IEnumerableTestMethodCommand.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\AssemblyProvider\PlayerTestAssemblyProvider.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Commands\OuterUnityTestActionCommand.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Assertions\Is.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\TestRunner\RemoteHelpers\RemoteTestResultDataWithTestData.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Attributes\UnityPlatformAttribute.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Runner\PlaymodeWorkItemFactory.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\AssemblyProvider\ScriptingRuntimeProxy.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Commands\SetUpTearDownCommand.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Assertions\LogAssert.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Attributes\UnitySetUpAttribute.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\TestRunner\TestEnumeratorWrapper.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Commands\TestActionCommand.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Runner\RestoreTestContextAfterDomainReload.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\AttributeHelper.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Attributes\UnityTearDownAttribute.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Assertions\LogScope\ILogScope.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\TestRunner\TestListenerWrapper.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Commands\TestCommandPcHelper.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\ColorEqualityComparer.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Attributes\UnityTestAttribute.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Runner\UnityLogCheckDelegatingCommand.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Assertions\LogScope\LogEvent.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\TestRunner\TestPlatform.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\ConstructDelegator.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\CoroutineRunner.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\BaseDelegator.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Runner\UnityTestAssemblyRunner.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Assertions\LogScope\LogMatch.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\TestRunner\TestRunnerFilter.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\PostBuildCleanupAttribute.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\FloatEqualityComparer.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Commands\BeforeAfterTestCommandBase.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Filters\AssemblyNameFilter.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Assertions\LogScope\LogScope.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\AssemblyProvider\AssemblyLoadProxy.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Runner\UnityTestExecutionContext.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\IOuterUnityTestAction.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Filters\CategoryFilterExtended.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Commands\BeforeAfterTestCommandState.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\AssemblyProvider\AssemblyWrapper.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Assertions\UnexpectedLogMessageException.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Runner\UnityWorkItem.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\PrebuildSceneSetupAttribute.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\IPostBuildCleanup.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\IStateSerializer.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\AssemblyProvider\IAssemblyLoadProxy.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Assertions\UnhandledLogMessageException.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Commands\EnumerableApplyChangesToContextCommand.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Runner\UnityWorkItemDataHolder.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\IPrebuildSceneSetup.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Runner\CompositeWorkItem.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\QuaternionEqualityComparer.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\Vector2ComparerWithEqualsOperator.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\TestRunner\ITestRunnerListener.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\NUnitExtensions\Runner\WorkItemFactory.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\StacktraceFilter.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\Utils.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\TestRunner\Messages\IEditModeTestYieldInstruction.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\TestRunner\Callbacks\PlayModeRunnerCallback.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\Vector2EqualityComparer.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\TestRunner\Callbacks\RemoteTestResultSender.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\TestRunner\PlaymodeTestsController.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\Vector3ComparerWithEqualsOperator.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\TestRunner\Callbacks\TestResultRenderer.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\TestRunner\PlaymodeTestsControllerSettings.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\Vector3EqualityComparer.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\TestRunner\Callbacks\TestResultRendererCallback.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\TestRunner\RemoteHelpers\IRemoteTestResultDataFactory.cs’ could not be found.
1>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.test-framework\UnityEngine.TestRunner\Utils\Vector4ComparerWithEqualsOperator.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_Style.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_CoroutineTween.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_SelectionCaret.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_LineInfo.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_TextInfo.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMPro_ExtensionMethods.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\FastAction.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_StyleSheet.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_DefaultControls.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_Settings.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_ListPool.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_SubMesh.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\MaterialReferenceManager.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_Dropdown.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_Sprite.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_Asset.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_SubMeshUI.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\PackageResourceImporterWindow.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMPro_FontUtilities.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_TextUtilities.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TextContainer.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_MaterialManager.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_Text.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_MeshInfo.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMPro_MeshUtilities.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_FontAsset.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TextMeshPro.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_UpdateRegistery.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_UpdateManager.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_SpriteAnimator.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_TextElement.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_ColorGradient.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMPro_Private.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_InputField.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_ObjectPool.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_SpriteAsset.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMPro_ShaderUtilities.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_InputValidator.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_XmlTagStack.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_ScrollbarEventHandler.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMPro_UGUI_Private.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_SpriteAssetImportFormats.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMPro_EventManager.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TextMeshProUGUI.cs’ could not be found.
2>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_Compatibility.cs’ could not be found.
3>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.analytics\DataPrivacy\AssemblyInfo.cs’ could not be found.
3>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.analytics\DataPrivacy\DataPrivacy.cs’ could not be found.
3>CSC : error CS2001: Source file ‘E:\XBoxTest\XBoxTest\Packages\com.unity.analytics\DataPrivacy\DataPrivacyButton.cs’ could not be found.
========== Build: 0 succeeded, 3 failed, 0 up-to-date, 0 skipped ==========

Shouldn’t an empty scene just compile straight away? Are there certain hoops I need to jump through first? Are there any guides, as the ones I found on YouTube are all earlier versions of Unity that have .Net rather than ILLCP or whatever the term is

Turns out when you build the UWP project in Unity, the process creates 2 .sln files and opens a window with the “wrong” one i.e. not the one you should load into Visual Studio. I don’t know if that’s a bug or just my lack of knowledge but this might help someone