Juice.TV

Hey there, I'm trying to log into my rlcraft solo-player world, but i immediately get kicked and "the server is shutting down" even though im playing solo. in the end it says: invalid move player packet received. I was just exploring and then summoned my Morock, and as i wanted to jump on, i briefly went through the map and got kicked. The same when i want to rejoin. I see my toolbar but no world and only a few seconds later i get kicked. Im not that well knowing in Software and programing, so i would apreciate a rather simple answer if possible or a detailed solution. I worked hard for about 3 weeks in this world and loosing it would be very annoying. Thx. in advance, And hope for a rather quick reply