403 Error in Forum Management

[Sanctaria]

Hello,

I'm getting a 403 Error when trying to change some forum permissions in forum management. I'm able to unselect Forum Open on any new forum or sub forum I create, but any previously created, when I try to select the same, I get the 403 error.

Edit to add I'm running 1.8.29

[Matt]

Can you ask your host if there's any error logs or security rules that are being triggered? Is unusual to be getting this sort of error when setting permissions specifically.

[Sanctaria]

It was triggering ModSec rules. That's resolved now - thanks!