Looking for logging into the Ubuntu Update site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Ubuntu Update site. After that you can login as usual with your login credentials.
https://askubuntu.com/questions/1031797/ubuntu-18-upgrade-failing-to-login-after-upgrade
https://administrator.de/forum/ubuntu-17-10-kein-login-upgrade-362659.html
https://www.reddit.com/r/Ubuntu/comments/8fo588/i_cant_login_after_installing_1804/
https://wiki.ubuntu.com/SoftwareUpdates
https://praxistipps.chip.de/ubuntu-login-funktioniert-nicht-was-tun_38592
https://ubuntuforums.org/showthread.php?t=2388622
https://forum.ubuntuusers.de/topic/grafischer-login-nach-update-nicht-mehr-moegli/
https://vitux.com/how-to-change-sudo-password-in-ubuntu/
https://uberubuntu.info/questions/78322/1704-update-login-schleife
https://itsfoss.com/how-to-fix-no-unity-no-launcher-no-dash-in-ubuntu-12-10-quick-tip/
https://dev.to/bobnadler/ubuntu-1804-upgrade-problem-resolutions-1ni0
https://devcenter.heroku.com/articles/heroku-cli
https://www.heise.de/tipps-tricks/Ubuntu-manuell-updaten-3877781.html