Board Thread:Modded Server Technical Support/@comment-28054934-20160325173630/@comment-26172435-20160408210458

That's an pretty recent Forge version and it wouldn't surprise me it's not fully compatible with the mod. I'm still using 10.13.2.1291 and I never have any problems. There may be a good reason the Official Server hasn't upgraded it's Forge version to a much more recent one. Try a Forge downgrade.