I have imported the challenge 1 package into my game but it’s not running and I am getting many errors. The game was running fine before the import. I am using Unity 2019.4. Any fix for this.
Errors:
Library\PackageCache\com.unity.package-manager-ui@2.0.7\Editor\AssemblyInfo.cs(7,12): error CS0246: The type or namespace name ‘UxmlNamespacePrefixAttribute’ could not be found (are you missing a using directive or an assembly reference?)
Library\PackageCache\com.unity.package-manager-ui@2.0.7\Editor\Sources\Services\Common\Resources.cs(1,32): error CS0234: The type or namespace name ‘UIElements’ does not exist in the namespace ‘UnityEngine.Experimental’ (are you missing an assembly reference?)
Library\PackageCache\com.unity.package-manager-ui@2.0.7\Editor\Sources\UI\PackageDetails.cs(25,26): error CS0246: The type or namespace name ‘VisualElement’ could not be found (are you missing a using directive or an assembly reference?)
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