Failure to auth

I recently created this account, so I can upload an extension.
I go to the Login Page on extensions.libreoffice.org
Upon clicking on the login button I get redirected to auth.documentfoundation.org where I login, but never get redirected back.

All I get so see after successfully authenticating:
A required attribute is not available
and I am stuck on this url:
https://auth.documentfoundation.org/saml/singleSignOn?SAMLRequest=...${some auth token which I won't post here}
I have cross site cookies enabled and checked the logs, where i got to see logged in the console:

 {
   displaytab: "",
   choicetab: "",
   newwindow: 0,
   appslistorder: "",
   scriptname: "",
   activeTimer: 0,
   pingInterval: 0,
   trOver: {
      all: {}
   }
}

All Browser Extensions are disabled and I have tried it with LibreWolf 138.0.3 & Mullvad 14.5.1, both FireFox based browsers. I run Linux. This is the guide i followed. I hope this helps resolving the issue.