Unable to start a new topic

I was able to start a new topic, ask a question and see replies once, but now most categories and topics including where I previously posted seem to show the lock icon. I have cleared browser cache and cookies, and re-logged in but that didn’t help. What am I doing wrong?

Topics and categories with lock icon are only visible to logged-in members. You should be able to post once you are logged in. If not, please let me know what exactly happens when you try to post or what prevents you from posting.

Sorry, nevermind I think I’m back on track. Posted a question successfully just now.