Hi ofurpesi,
Looks like your Micro-SD card is corrupt or redis (the internal database in Rune) has become unstable.
To reset redis:
First make a note you IP address which has been allocated to Rune, you may need it later (see the Network menu page). Then log in via SSH and try the following commands.
redis-cli set playerid ‘’
redis-cli set hwplatformid ‘’
/var/www/command/rune_shutdown poweroff
shutdown -P now
This will force a redis reset and shutdown the Pi. Remove and restore power to restart. You will lose some of your configuration settings. After the restart check the Settings and MPD menu pages. Use the noted IP-address if you have difficulty accessing Rune.
If this fails to solve the problem, you will need to re-flash your Micro-SD card.
janui