I open muse.unity.com, enter the request, then the authorization process happens, and then I get the screen below:
Hi, could you try again and let us know if the problem is persistent? Thank you 
cc: @antoniancu
However, I used it several weeks ago, but now there is 502 error again. After trying to update the 502 error page, I got the screen below:
Can you provide any update?
Hi @makaka-org - apologies for the delay! In all honesty, I’ve been on vacation but back again - could you try accessing Muse Chat again, clearing cookies, signing out etc?
I’m curious how you ended up in the above screen with the auth callback… I’ll forward this to our engineers.
it was with Google Chrome on macOS Ventura.
Just tried new authorization with DuckDuckGo browser - got white screen.
It’s been a month, I still can’t use Unity Muse.
Thank you for the high-class support.