Hi Guys,
You may face this issue before. After upgrading to newer version to Plesk, it keep looking to "hostname.local:8443/relay".
How to fix this?
Make sure the ports 11444, 8880, 8443, 11222 are open and accessible.
If there is no issue with the ports and the firewall disable the "sso" feature.
/usr/local/psa/bin/sso --disable
Then again. You can see it loading fine!