I got Plesk installed a while ago with mariadb, now unfortuantely mysql_upgrade fails because it cannot find the socket. Actually Plesk did auto-update, and I suppose mariadb got also updated, which triggered the mysql_upgrde, which failed (which lead to an error 500, same as this one).
By...
I have xdebug installed and I want it to give a path where the customer has access too.
As it seems I only have one global folder to configure that, and it is in /opt/plesk/php/7.1/etc/
I tried adding /opt/plesk/php/7.1/etc/php.d/50-xdebug.ini
xdebug.profiler_output_dir ="{WEBSPACEROOT}"
But...