Odroid: Failed to connect to database two days after a running cloud

nc-info says:

Launching nc-info
Gathering information...
NextCloudPi version  v0.66.4
NextCloudPi image    NextCloudPi_11-04-18
distribution         Debian GNU/Linux 9 \n \l
automount            yes
USB devices          sda 
datadir              /media/DATA-SERVER/ncdata
data in SD           no
data filesystem      ext2/ext3
data disk usage      42G/470G
rootfs usage         3,6G/9,1G
swapfile             /var/swap
dbdir                /media/Datenbanken/ncdatabase
Nextcloud check      ok
Nextcloud version
HTTPD service        up
PHP service          up
MariaDB service      up
Redis service        up
Postfix service      up
internet check       ok
port check 80        open
port check 443       closed
interface            enx001e063604a3
certificates         none
NAT loopback         no
uptime               31min

I restartet mysqld, mariadb, php7.2-fpm and apche2, but nothing better.
The dirs for data and database are correct, the partitions are mounted.
What else can I do?


solved: it was a type mismatch, my wife saw it …