Plesk panel 404 /relay after upgrade

After  upgrading plesk control sometimes it happens that your Plesk admin panel starts redirecting to hostname:8443/relay and whichresults in a 404 not found page and this happens when  you select/activated  sso component while upgrading your Plesk control panel.


You can fix  this by  simply running the below command as root user : 


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


That’s all you are done.