Halcyon can't log in anymore
There's a problem with the OAuth login at newer Pleroma instances using Halcyon.It always says "Unlisted redirect_uri" with force_login=False or redirects without a OAuth code without force_login=False.I wrote you a more detailed post yesterday using my personal account.I checked the redirect_uri multiple times and it is definitely correct.
https://social.csswg.org/users/halcyon/statuses/102552503959769617