When the “Lock and Protect System Folders” setting is enabled, it appears to cause an error loading a file from the LiteSpeed Cache plugin folder.
/wp-content/plugins/litespeed-cache/guest.vary.php 403 (Forbidden)
Disabling the settings sees the error go away. Could possibly happen if the settings alter the directory path to these folders or similar maybe? What exactly is the setting modifying?
I did also notice with the setting turned on, the mobile site header has display issues. I haven’t looked into that; could be related to the caching maybe. Not the topic of this post so I’ll leave that for now.