Crash on server when used with SpongeForge

[Danymaddox]

Hi! I'm getting this crash when I put SpongeForge and DummyCore in the same forge Server
Dummy Core: 2.2.189.0
SpongeForge: 1.8.9-1808-4.1.0-BETA-1282
Forge: 11.15.1.1855
Minecraft: 1.8.9

CrashLog: https://mega.nz/#!pMZkUDiT!7kDzjGlu8py6A8wyl3TlWAo07OmGUQHIOihEaRu9b0A

I think this is the correct CrashLog, if you need other tell me

Thanks!