Nevermind, i finally found this: https:// git.ispconfig.org/ispconfig/ispconfig3/issues/2178 And set it up in system - main config: https://...
Set it up in system - main config: "https:// [SERVERNAME]:8080/phpmyadmin"
I think i have found a bug in ISPconfig 3.1, I have a Multiserver setup, but all the myphpadmin links in administration only link to the main...
Separate names with a comma.