Собственно проблема в заглавии. Debian 11, Squid 4.13. При squid -k reconfigure выдаёт:
~# squid -k reconfigure
2022/03/31 02:18:40| FATAL: failed to open /run/squid.pid: (2) No such file or directory
exception location: File.cc(190) open
Конфиг squid’а: https://controlc.com/6d0da5e2