When trying to login just now I got the following error back:
Could not authenticate you from Ldapmain because "Invalid filter syntax.".
Github login still works however.
@fbartels Can confirm. Investigating.
OK, so the issue was that the app thinks it's configured for LDAP, but it's not (since it's a public facing instance, we disabled LDAP). I have removed the LDAP panel entirely from the login page. Thanks for reporting @fbartels