Immediately after updating to Plesk 18.0.57 I started receiving hourly cron job notices by email:
Subject: Cron <root@hostname> run-parts /etc/cron.hourly
/etc/cron.hourly/01-awp_hourly:
AIR_GAPPED set to yes. Skipping execution of awp_hourly
And indeed, in /var/awp/etc/config (sourced...