Squid webproxy is not blocking the sites as per block category.

Configuration-

set service webproxy listen-address 172.16.32.1 disable-transparent
set service webproxy url-filtering squidguard auto-update update-hour '4'
set service webproxy url-filtering squidguard block-category 'social_networks'

Squid Logs-

2022-07-11 17:18:17 [299548] (squidGuard): FATAL: ACL destination local-ok-default is not defined in configfile /etc/squidguard/squidGuard.conf
2022-07-11 17:18:17 [299548] ERROR: Going into emergency mode