Phpmyadmin is displayed without SSL and need refresh page everywhile

Server os version:
CentOS 7 with CyberPanel
Cyperpanel version:
Current Version
2.1
Build
2
Latest Version
2.3
Latest Build
6

Although the SSL is issued, phpmyadmin when browsing shows that “Your connection is not private”. I click “Advanced” to open the page anyway, and then phpmyqdmin kepps losing connection everytime it is idle for less than a minute.



Now we dont support centos 7 so errors are acceptable on this and most other services don’t have the update on centos 7 now.

So what to do. If centos 7 is not supported, then it must be changed or updated. As subscriber, I have the right to be supported including system upgrade.

Any solution? Are we supposed to change the OS? to what? and how?