Yesterday I added a new player to my server. He started off fine but suddenly could no longer interact with anything, as if he was in adventure mode. I tried everything, changing his gamemode, restarting the server, etc. I made him OP and then took it away and that seemed to work but only for a short while.
There are 7 other people on the server and no-one else has ever had this problem. We have the ImageonMap plugin but no others. Another player joined recently and they didn’t have this problem either. Please help!