Use the new “EditorActorSubsystem” (UEditorActorSubsystem | Unreal Engine Documentation). Example:

You can find more sensible deprecation messages in the UE5 source code, using github.
Use the new “EditorActorSubsystem” (UEditorActorSubsystem | Unreal Engine Documentation). Example:

You can find more sensible deprecation messages in the UE5 source code, using github.