Failed with result 'start-limit-hit'

Sonarr version (exact version): 3.0.6
Mono version (if Sonarr is not running on Windows): 5.18.1.0
OS: Linux ReadyNAS 4.4.218.x86_64.1 #1 SMP Tue May 25 00:35:44 UTC 2021 x86_64 GNU/Linux
Debug logs: Not available, if someone can tell me where to find them I can add them
Description of issue:

I tried to install sonarr v3 on my readynas. I’m running it with user and group nzbdrone in order to get permissions already in order, but I’m unable to start the service. This is the output that I get from the service:

systemctl status sonarr
● sonarr.service - Sonarr Daemon
Loaded: loaded (/etc/systemd/system/sonarr.service; enabled; vendor preset: enabled)
Active: failed (Result: start-limit-hit) since Wed 2022-01-12 22:15:44 CET; 17min ago
Process: 11497 ExecStart=/usr/bin/mono --debug /opt/NzbDrone/NzbDrone.exe -nobrowser (code=exited, status=2)
Main PID: 11497 (code=exited, status=2)

Jan 12 22:15:44 ReadyNAS systemd[1]: sonarr.service: Unit entered failed state.
Jan 12 22:15:44 ReadyNAS systemd[1]: sonarr.service: Failed with result ‘exit-code’.
Jan 12 22:15:44 ReadyNAS systemd[1]: sonarr.service: Service hold-off time over, scheduling restart.
Jan 12 22:15:44 ReadyNAS systemd[1]: Stopped Sonarr Daemon.
Jan 12 22:15:44 ReadyNAS systemd[1]: sonarr.service: Start request repeated too quickly.
Jan 12 22:15:44 ReadyNAS systemd[1]: Failed to start Sonarr Daemon.
Jan 12 22:15:44 ReadyNAS systemd[1]: sonarr.service: Unit entered failed state.
Jan 12 22:15:44 ReadyNAS systemd[1]: sonarr.service: Failed with result ‘start-limit-hit’.

However, this isn’t telling me much on what the exact issue could be… Anyone knows what I can do or what else I might need to provide?

Why are you trying to run Sonarr v2 (nzbdrone) when you have v3 (Sonarr) installed?

I’m thinking whatever instructions you followed are not only woofully out of date but utterly wrong.

V2 has been EOL since 3/2021

As said, I’m running it with the user nzbdrone, but it is version 3.0.6.

But found the issue, had a service script created for V2 that was called sonarr.service, which I had to remove before installing V3.