You were likely suspended.
Your fellow users can report improper comments or conduct in the app, particularly those that violate Quidd's Community Policy.
If this is your first offense, your account will be automatically suspended, disabling your ability to comment on a feed article, send a trade post, chat with friends, and trade with fellow users. You can still view your collection and otherwise use the app. This state is temporary and will only last a brief period, likely less than one day.
If this is your second or third offensive, the length of your suspension will be considerably longer, if not permanent, following review by a Quidd Pro.