PUN Basics Tutorial - Error

Hi,

When I play the PUN Basics Tutorial in Unity and quit the game scene (to return to the launcher) I get the following error message:

MissingReferenceException: The object of type 'PlayerManager' has been destroyed but you are still trying to access it.
Your script should either check if it is null or you should not destroy the object.

I haven't changed anything. I'm surprised to be finding errors in the tutorial provided. Can someone help explain how to fix this?

Cheers,

HK