I having a problem where my portal users are unable to post on my Odoo forum, but internal users can post to the forum with no issues. When the portal users press the "Post my question" button a page shows up with a "403: Forbidden" error. I have looked at the User Types/ Portal access rights to forum posts and it has read, write, create, and delete rights. I'm not sure how to fix this. Has anybody else had this issue?