You would know if you were in moderation because a forum moderator would contact you in PM to discuss things with you first. You, like every user here, will occasionally come across a generic, non specific error message like the one you did. This is not personalized in any way and just means, “Oops sorry we can’t fulfill your request right now.” It’s written for a whole bunch of possible causes and I’m sorry you took it personally.

If you come across this message in the future, you can PM any moderator to ask why it’s not letting you post to a specific thread any longer. The reason you will be told 9 times out of 10 is because the thread was moved or closed (again, having nothing to do with you).

Hope this helps.