Hello!
There was a recent change that was implemented to help sort out bots in the channel. We wanted to help the rest of staff cope with the amount of bot attacks that have been happening and prevent the issue from disrupting the community.
As such we have implemented a system that prevents Bots from PM-ing the users of the channel. You however must pass a test in order to prove you are not a bot. The solution to this test is hidden in the rules. We have faith that after reading through them, you will be able to grant yourself access back into the community.
spoiler
Psssst The solution is in your screenshot you posted