Looking for logging into the Screen Allows Only Root 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 Screen Allows Only Root site. After that you can login as usual with your login credentials.
https://ubuntuforums.org/showthread.php?t=2375804
https://askubuntu.com/questions/451950/how-to-configure-lightdm-to-allow-manual-logins-in-ubuntu-14-04
https://superuser.com/questions/697795/how-to-disable-root-login-from-login-prompt-but-allow-switching-to-root
https://forums.kali.org/showthread.php?4095-Users-Cannot-Login-Only-Root-Access
https://ask.fedoraproject.org/en/question/59717/root-login-from-logon-screen-fedora-21/
https://unix.stackexchange.com/questions/447632/how-to-prevent-root-login-from-gnome-3-login-screen-arch-linux
https://www.centos.org/forums/viewtopic.php?t=55139
https://forums.opensuse.org/showthread.php/512006-root-login
https://www.linuxquestions.org/questions/linux-software-2/sddm-splash-does-not-provide-for-root-login-4175612980/
https://itsfoss.com/how-to-hack-ubuntu-password/
https://www.tecmint.com/enable-and-disable-root-login-in-ubuntu/
https://www.tecmint.com/disable-root-login-access-to-phpmyadmin/
https://www.howtogeek.com/124950/htg-explains-why-you-shouldnt-log-into-your-linux-system-as-root/