how to debug?

Hi everyone.
few days ago i discovered dietpi - looks very good. My Rpi working as shairport machine. I installed shairport-sync via dietpi optimized software. 2 days working fine, but today does not play. If i run it from shell (/usr/local/bin/./shairport-sync) it wroks, but when i run it using dietpi-services start shairport-sync - not working. when i start it from shell i can add -vvv and see debug info. How to debug software using dietpi-services ? there is no logs, no matter i use ram temp, or ram + disk.

thanks.

dietpi-services starts Shairport Sync via systemd unit.
You can try this manually:

systemctl start shairport-sync
systemctl status shairport-sync

Paste the output here please.