I copy an past my Authentication token int foundry VTT (ver 13.351) and it doesn’t save it no mater how many time I copy and past it. It worked before not sure what changed.
Hiya,
Might be worth reporting this as a bug here:
And/or first reach out on the Discord to see if this is happening to anyone else, since I don’t see anyone reporting it yet on the github.
Metamorphic are the nice coders who are managing this one for us, so I’m a bit out of touch with the code (and with Foundry).
Wanna try reaching out as above and then report back here.
In the meantime, I will check in with OUR devs to see if they have any ideas. 
Good hunting!
Thoughts from devs:
Have you tried rolling back to the previous version and seeing if it starts working again = good test to see if it really IS the update.
If it also doesn’t work in the old version, then maybe you are pasting the wrong code, or have an initial or trailing SPACE that’s breaking something, or things like that?
(just a couple of quick ideas)