Problem logging in to YunoHost after upgrade

Having an issue after upgrading [[YunoHost]] from 4.0.8.3 to 4.1.4.4. I can't log in to the SSO section.

It just reloads the page - no suggestion that password is wrong.

• With an unknown user
  • "Wrong username or password"
• With my user, and the wrong password
  • "Wrong username or password"
• With my user, and the correct password
  • just reloads the login screen
• I can still log in to admin fine.
• can't see anything relevant in the permissions section
• if I create a new user, same issues.
• updated the server

Logs

• nothing in /var/log/nginx/ssowat.log

• can't see anything relevant in /var/log/nginx/site.domain-access.log or /var/log/nginx/site.domain-error.log

• the accesses are there, but no errors

Misc

• Updated timezone while I was at it in case some time mismatch thing

• the timezone was Europe/Berlin, which is wrong for me

• sudo timedatectl set-timezone Europe/London

Resolution

• Ah, fixed it! Deleting all the cookies for my yunohost domain sorted it out.