Made me laugh on that last sentence. Tough times to be sure. 😉 I’m thinking maybe you changed the default ARQ settings to include your WordPress /plugins/ folder. The BPS Pro Plugin Firewall protects the WordPress /plugins/ folder. So you don’t need to additionally included the /plugins/ folder within the BPS Pro ARQ settings.
To fix the issue/problem will probably require doing these steps in this forum topic > https://forum.ait-pro.com/forums/topic/website-not-loading-after-wordpress-upgrade-or-theme-upgrade-500-error-files-quarantined/