Code 32767 (Non token authentication is not allowed)

Hello,

I'm working on a client's game that makes use of Photon. For the past months it's been working fine, but these last days I've been getting this error constantly :

`OperationResponse 230: ReturnCode: 32767 (Non token authentication is not allowed). Parameters: {} Server: GameServer Address: 92.38.154.73:5056`

After checking out months old commits, it seems the error also happens on these older commits (even though back then, the error did not happen at all).

So it seems that something changed on Photon's side, independant from our codebase, and is causing this error. Do you have any idea what it could be?

Pun version is 2.6, Photon lib is 4.1.2.7, we did not hit our CCU limit (only 2/20) and the app id is properly set in the Photon settings file.

Thanks in advance!