"403:Forbidden" is a daily companion when using Odoo's forum (editing, deleting, converting or adding posts or comments), but since some hours it hits when trying to post a new question. @Yenthe666 you may know whom to ping :-)
Should be fixed now...
Error of 'Access read' on the new filter to avoid spam 👎
@JKE-be The best antispam measure I've seen so far ;-)