Error (403 forbidden) when creating task in v1.2.18

Getting tasks silently fail to create and 403 error in browser console - not sure where to go with it.

I’m an admin in the project - tried a few other users too with similar issue

Seeing if (Help - Possible Permission Issue - Adding Task / Removing or Modifying Column --- SOLVED) solves it

UPDATE - disabling mod_security for the subdomain enables task creation. No idea what is actually happening, has been working up until last week or so - possibly related to newer version?