Plesk login gives continously 'CONTINUE'

[sven_sim]

If while login into your plesk panel on Linux server you get "Continue" button instead of logging in successfully .

One of the possible reasons might be the SSO (Single Sign-On Configuration) utility is preventing the user account to login successfully.

SSO is a specialized form of authentication that allows a user to enter login and password only once during a session.

You can resolve the issue by executing the following command on shell prompt with root privileges.

/usr/local/psa/bin/sso -d
or
/usr/local/psa/bin/sso --disable

The above will disable the SSO authentication mode in Plesk and you can successfully login to the plesk panel.