Could not load type 'UnityEditor.iOS.Xcode.PBXProject

Questions & Answers
1

I got many kinds of this error when I use Firebase Unity with Unity 5.6 for iOS. Could any one help?

TypeLoadException: Could not load type 'UnityEditor.iOS.Xcode.PBXProject' from assembly 'Google.IOSResolver'.
Google.IOSResolver..cctor ()
Rethrow as TypeInitializationException: An exception was thrown by the type initializer for Google.IOSResolver
System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:222)
Rethrow as TargetInvocationException: Exception has been thrown by the target of an invocation.
System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:232)
System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MethodBase.cs:115)
Google.VersionHandler.InvokeMethod (System.Type type, System.Object objectInstance, System.String methodName, System.Object[] args, System.Collections.Generic.Dictionary`2 namedArgs)
Google.VersionHandler.InvokeStaticMethod (System.Type type, System.String methodName, System.Object[] args, System.Collections.Generic.Dictionary`2 namedArgs)
FirebaseMessagingDeps.SetupDeps () (at Assets/Firebase/Editor/MessagingDeps.cs:60)
FirebaseMessagingDeps..cctor () (at Assets/Firebase/Editor/MessagingDeps.cs:23)
Rethrow as TypeInitializationException: An exception was thrown by the type initializer for FirebaseMessagingDeps
System.Runtime.CompilerServices.RuntimeHelpers.RunClassConstructor (RuntimeTypeHandle type) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Runtime.CompilerServices/RuntimeHelpers.cs:101)
UnityEditor.EditorAssemblies.ProcessEditorInitializeOnLoad (System.Type type) (at C:/buildslave/unity/build/Editor/Mono/EditorAssemblies.cs:136)
Rethrow as TargetInvocationException: Exception has been thrown by the target of an invocation.
System.Reflection.MonoCMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:519)
System.Reflection.MonoCMethod.Invoke (BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:528)
System.Reflection.ConstructorInfo.Invoke (System.Object[] parameters) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/ConstructorInfo.cs:77)
System.Activator.CreateInstance (System.Type type, Boolean nonPublic) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System/Activator.cs:372)
System.Activator.CreateInstance (System.Type type) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System/Activator.cs:254)
UnityEditor.AssetPostprocessingInternal.GetAudioProcessorVersions () (at C:/buildslave/unity/build/Editor/Mono/AssetPostprocessor.cs:339)
UnityEditor.AssetPostprocessingInternal:GetAudioProcessorVersions()
2

I got a similar issue here. I tried to build iOS for my unity project on my macbook pro, but got:

TypeLoadException: Could not load type 'UnityEditor.iOS.Xcode.PBXPath' from assembly 'UnityEditor.iOS.Extensions.Common'.
UnityEditor.iOS.PostProcessiPhonePlayer.PostProcess (BuildTarget target, System.String stagingAreaData, System.String stagingArea, System.String stagingAreaDataManaged, System.String playerPackage, System.String installPath, System.String companyName, System.String productName, BuildOptions options, UnityEditor.RuntimeClassRegistry usedClassRegistry) (at /Users/builduser/buildslave/unity/build/PlatformDependent/iPhonePlayer/Extensions/Common/BuildPostProcessor.cs:554)
UnityEditor.iOS.iOSBuildPostprocessor.PostProcess (BuildPostProcessArgs args) (at /Users/builduser/buildslave/unity/build/PlatformDependent/iPhonePlayer/Extensions/Common/ExtensionModule.cs:27)
UnityEditor.PostprocessBuildPlayer.Postprocess (BuildTarget target, System.String installPath, System.String companyName, System.String productName, Int32 width, Int32 height, System.String downloadWebplayerUrl, System.String manualDownloadWebplayerUrl, BuildOptions options, UnityEditor.RuntimeClassRegistry usedClassRegistry, UnityEditor.BuildReporting.BuildReport report) (at /Users/builduser/buildslave/unity/build/Editor/Mono/BuildPipeline/PostprocessBuildPlayer.cs:176)
UnityEditor.HostView:OnGUI()
3

@LeGiangAnh

Has anyone solved the problem?