Looking for logging into the Ubuntu One Problem 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 One Problem site. After that you can login as usual with your login credentials.
https://ubuntuforums.org/showthread.php?t=2338874
https://askubuntu.com/questions/839293/16-10-cannot-sign-in-to-ubuntu-one-account-from-ubuntu-software
https://bugs.launchpad.net/bugs/1618041
https://bugs.launchpad.net/bugs/1581713
https://login.launchpad.net/+faq
https://login.ubuntu.com/one-redirect
https://forum.ubuntuusers.de/topic/ubuntu-one-login-probleme-seit-upgrade/
https://www.omgubuntu.co.uk/2011/11/logging-into-ubuntu-using-ubuntu-one
https://beamtic.com/installing-snaps-ubuntu
https://en.wikipedia.org/wiki/Ubuntu_Single_Sign_On
https://www.reddit.com/r/Ubuntu/comments/6xdj0u/why_would_i_want_to_make_an_account_for_snap/
https://www.maketecheasier.com/fix-ubuntu-login-loop/
https://unix.stackexchange.com/questions/223049/ubuntu-one-problem-while-trying-to-register