Board Thread:Modded Server Technical Support/@comment-33590833-20180322124545/@comment-26276264-20180322130309

On Forge the world folder for Middle Earth is called "MiddleEarth" while on KCauldron it is referred to as "DIM100", so remove the freshly generated DIM100 and rename your "MiddleEarth" to "DIM100" and it should be good.