MonoScriptImporterInspector.OnEnable must call base.OnEnable to avoid unexpected behaviour.
UnityEditor.Tilemaps.GridPaintPaletteClipboard:OnDisable () (at Library/PackageCacheemail@example.com/Editor/GridPaintPaletteClipboard.cs:347)
It would appear to be an issue with something in the tilemap library, does it matter? Would it be fixed via re-importing?
this type of errors usually get fixed updating to latest lts version and using packagemanager to update the specifiq package.
@penguin137, Using the wrong box collider can cause this error. make sure they are all box collider 2D.
@penguin137, did you ever figure out what the problem was? I get this exact error with a fresh tilemap project in Unity 2020.3, even before any colliders are added.