When accessing CloudBees CD (CloudBees Flow) URL after upgrading to CloudBees CD (CloudBees Flow) version 9.2, attempting to login results in an endless refresh/redirect from the login page to itself.
You can work around this issue by cleaning the cookies in your Web Browser.
You can do it following the steps:
The fix to this issue is planned to be released in the next CloudBees CD (CloudBees Flow) LTS Version, it is already fixed in the
2020.01.00 Preview release.