I can't post on the forums

Dear Blizz CS, I have 30 days of game time but cannot post on the main forums. I suspect this has to do with me not having had a “subscription” for a very long time (due to WoW tokens). I previously directly converted wow tokens into game time and still couldn’t post. This time, I converted to bnet balance first and then bought game time from the store page but still cannot post.

I believe this is some sort of bug as from what I’ve read, so long as I have gametime on my account I should be able to post.
Thanks for any info.

edit: I tried deleting all cookies, restarting browser, then logging back in again. This seems to have solved the problem.