Seeing a "Site Currently Unavailable" message can cause stress, but you can fix...

https://zoom-wiki.win/index.php/Site_Currently_Unavailable_After_Enabling_a_Security_Plugin:_Troubleshooting_Guide

Seeing a "Site Currently Unavailable" message can cause stress, but you can fix it quickly. Start by checking your site's permissions to ensure files aren’t blocked, especially look out for 403 errors