Opening Prefab Mode failed: The Prefab at 'Assets/Resources/PhotonVR/Player.prefab' is broken. UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)

I get this error when i open my prefab (btw this is vr)

Opening Prefab Mode failed:
The Prefab at 'Assets/Resources/PhotonVR/Player.prefab' is broken.
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)

Any Solutions?