Colt352

Hi there, after recently creating a custom server for my friends and I to play on, I noticed that several of the mods were corrupted and weren't loading all of the necessary details and blocks to make its object. We had used DeceasedCraft as a test and every time we loaded the server, it would corrupt the surrounding areas and never spawn the full cities as it is supposed to. I tested the mods on a singleplayer server and it worked amazing, everything loaded in and ran perfectly fine. I have found that it is not the placement of mods that is causing it to corrupt but I am genuinely confused as to what I am doing wrong here. If anyone could assist me further with this and allow me to officially open my server to me and my friend group. Thank you