Hi there
Suddenly Sonarr and Radarr were gone and I had to reinstall them using
dietpi-software reinstall 144
dietpi-software reinstall 145
… I already knew the Issue with Jackett and regularly have to call
dietpi-software reinstall 147
to get it working again …
Why do those apps cripple themxelves? And will I have to check all the time now if they still work & reinstall them each time the apps update themselves? Kinda eery 
else: still loving the DietPi a lot! 
noobian
Please disable the internal updater for Jackett (“Disable auto update” checkbox). It is a known, still not resolved external bug, occurring in all cases where Jackett is started via systemd unit, so not related to DietPi.
Ref: https://github.com/MichaIng/DietPi/issues/2593
But Sonarr and Radarr should not have such an issue. What you mean by “they were gone”? Did you check service status and logs before reinstalling them?
Sry, I did not check service-status nor logs, just did a restart, and Sonarr and Radarr both could not be reached through their typical webaddress … after reinstall they worked fine.
Would you mind, posting me the two commands (service status, and get logs) here, so I will make sure to first call those, before reinstalling, in case this happens again?
Thx 4 all 
Those 4 should give a hint:
journalctl -u sonarr | tail -20
journalctl -u radarr | tail -20
tail -20 /var/log/sonarr/error.log
tail -20 /var/log/radarr/error.log
If the last two files do not exist, probably they are called sonarr.log, radarr.log or similar, not sure currently, but there should be only one file each dir
.