So I was loading my modpack with sponge and several plugins, but it seemed as if I could only run one or the other. After testing multiple mods, what I found was that sponge and its plugins would only load if the mod Davincis Vessels were removed.
Server log without davincis vessels: https://pastebin.com/wSQJT0jp
Server log with davincis vessels: https://pastebin.com/5jrMng4K
Any idea on how I could fix this? Help is much appreciated.