$ systemctl status pppd-dns.service
● pppd-dns.service - Restore /etc/resolv.conf if the system crashed before the ppp link was shut down
Loaded: loaded (/lib/systemd/system/pppd-dns.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Fri 2023-03-24 15:05:58 UTC; 5min ago
Main PID: 890 (code=exited, status=203/EXEC)

Mar 24 15:05:58 debian systemd[1]: Starting Restore /etc/resolv.conf if the system crashed before the ppp link was shut down…
Mar 24 15:05:58 debian systemd[890]: pppd-dns.service: Failed to execute command: No such file or directory
Mar 24 15:05:58 debian systemd[890]: pppd-dns.service: Failed at step EXEC spawning /etc/ppp/ip-down.d/0000usepeerdns: No such file or directory
Mar 24 15:05:58 debian systemd[1]: pppd-dns.service: Main process exited, code=exited, status=203/EXEC
Mar 24 15:05:58 debian systemd[1]: pppd-dns.service: Failed with result ‘exit-code’.
Mar 24 15:05:58 debian systemd[1]: Failed to start Restore /etc/resolv.conf if the system crashed before the ppp link was shut down.