TextMesh Pro Essential Resources are missing, which are crucial for proper functionality. To import them, go to 'Window > Text Mesh Pro > Import TMP Essential Resources' in the menu.
UnityEngine.Debug:LogError (object)
TMPro.TMP_PackageResourceImporter:OnDestroy () (at ./Library/PackageCache/com.unity.ugui/Runtime/TMP/TMP_PackageResourceImporter.cs:28)
TMPro.TMP_PackageResourceImporterWindow:OnDestroy () (at ./Library/PackageCache/com.unity.ugui/Runtime/TMP/TMP_PackageResourceImporter.cs:261)
UnityEditor.ContainerWindow:RequestCloseSentByNativeCode ()