A friend and I have installed WorldEdit to our server on Aternos and there were not any problems. After a couple of relogs, however, the server did not load any of my items nor my skin,l lost all of my exp and levels, I couldn't interact with my kitties, could not open my Ender chests and I lost all of my admin powers. The only thing that comes to mind is my messsing around with the config file but I only changed how the inventory worked whiile worldbuilding. Perhaps my ip changed to the server? Does anyone know of a solution?
I should also mention; I tried downloading the world file and putting it into singleplayer where it loaded everything perfectly. I tried to replace the current world map with the one from singleplayer but it did not work however.