Well, something is going on with the server because it keeps giving this error over and over. So, I'm going to guess this is a mod problem. I'm sorry I can't tell you exactly what mod it is, but it looks like you are trying to do something and that causes your game to crash. Strangely the sever doesn't crash... it just suspends. I don't run a lot of mods on my server so I've never seen this problem.
4.4.2026 07:26:22 [Server Notification] Client funnyboy tried to place a block but rejected because OnPlaceBlock returns false. Failure code entityintersecting
4.4.2026 07:26:24 [Server Notification] Client funnyboy tried to place a block but rejected because OnPlaceBlock returns false. Failure code entityintersecting
4.4.2026 07:29:27 [Server Notification] Server ticking has been suspended