Error at step 12 Ubuntu20.04 Howto Perfect Server

it's Ubuntu 20.04, don't know how much that differs.

**edit*** now with added --debug

Code:

[INFO] Installed packages mailman
postalias: warning: /etc/aliases, line 1: need name:value pair
[INFO] Installing packages quota, quotatool, haveged, geoip-database, libclass-d                       bi-mysql-perl, libtimedate-perl, build-essential, autoconf, automake, libtool, f                       lex, bison, debhelper, binutils
[INFO] Installed packages quota, quotatool, haveged, geoip-database, libclass-db                       i-mysql-perl, libtimedate-perl, build-essential, autoconf, automake, libtool, fl                       ex, bison, debhelper, binutils
[INFO] Adding quota to fstab.
[ERROR] Exception occured: ISPConfigOSException -> Command mount -o remount / 2>                       &1 && quotaoff -avug 2>&1 && quotacheck -avugm 2>&1 && quotaon -avug 2>&1 failed                       . (/ispconfig.ai.php:15)

 

I Tried with --no-quota with same result. Tomorrow I will proceed. Thanks for now.

 

I reinstalled the server and chose Debian 10 instead of Ubuntu. Just to see what happens. Then followed this tutorial. Went smooth except for fstab there was some data i it, I left it. And of course the mount command again.
But I now have the same issue as here, would expect to be solved, so Roundcube has no connection to the database. (in fact this tutorial is more perfect than the ubuntu, as here is explained how to set the passwords.)
I double checked the passwords for pma@localhost ad they are correct. Strange thing is when I open domain.com/phpmyadmin and use pma as login and use the password, I can log in.
Maybe a root password has to be set at the question

Code:

MySQL application password for roundcube: <-- press enter

where we have to just hit enter?

thanks for any help.