If you do not have access to that forum, that would explain why you didn't search or post there in the first place.
These permission things happen every now and then; I don't know why (yet).
Challenge now is that I don't have the powers to grant someone access to a certain forum.
What you will have to do is contact the helpdesk (which they renamed Support and to which a link can be found at the top of this screen) and tell them you don't have the right forum permissions. Just keep clicking around in that thing, though choosing the option "Other" will like you get you to the "submit ticket" part the quickest.