I receive 403 messages inconsistently with several of your plug-ins with Jetpack security enabled or broken functionality.
Host: MDD Host with Litespeed on SSD
Theme: Headway on Multisite
Used your plug-ins in past no issue, good stuff.
Upgraded WP to current, and plug-ins, with no issue.
Ran backups with your solution, all good.
Ultimate Branding: in the login CSS option I was working away fine then began to receive 403's on save. Several changes had been made successfully then it just began. An hour later no problem.... until 10 or fifteen minutes later then again.
Member2: through dashboard, on install it showed successful but wasn't able to assign content to membership levels, was missing screens like Settings and Add-ons, not even in menu.
When creating membership, I could create but no secondary screens or assignments.
On assignments to memberships, 403.
Uninstalled Branding and Member2.
New site, few plugins used, disabled Jetpack.
Reinstalled Branding through dash and Member2, fixed and new menus and screens in Memebr2!?
I see the Jetpack white-list but concerned about functionality for future members, a little limiting too because I travel and on cable so random.
If it is Jetpack, as I assume, any code, whether function or htaccess, to resolve this so I can turn on Jetpack security? Any file permissions need changing?