Hello, This is due to thaumcraft that your server is not starting. You will need to try to delete the auras.dat in the world directory and clear the dim (not the regions or level.dat) and see if that fix it. We have the same issue on our server and thaumcraft seem to be buggy in total. Dont want to remove it but dont want it crashing because of flux, nodes, auras, etc (NBT related)