PHP8: Unable to add database on multiserver setup withs eparate DB server

Error message:

[Fri Dec 16 15:18:06.151694 2022] [fcgid:warn] [pid 1039:tid 139904281384512] [client xxx:59996] mod_fcgid: stderr: PHP Fatal error: Uncaught TypeError: in_array(): Argument #2 ($haystack) must be of type array, null given in /usr/local/ispconfig/interface/web/sites/database_edit.php:462, referer: https://xxx:8080/index.php