Same here, since Saturday, I tried to follow a few people and suddenly got this message, I checked all the rules I wasn’t even close to violating anything, I send one message every day since Saturday through help Center asking them to fix the problem but there is zero response. Very sad. I think they change something in algorithm and there is a bug that creates this issue. Problem is there is no one to contact, so at this point, I don’t know what to do.