backfire51

hi guys, i am getting this error whenever i try to start my minecraft forge server and i have no idea what's going on. ---- Minecraft Crash Report ---- // Don't do that. Time: 13.1.26 10.58 Description: Exception getting block type in world java.lang.NullPointerException at net.minecraftforge.common.ForgeChunkManager.fetchDormantChunk(ForgeChunkManager.java:883) at im.c(ChunkProviderServer.java:115) at im.d(ChunkProviderServer.java:166) at yc.e(World.java:524) at yc.a(World.java:404) at yc.c(World.java:433) at yc.b(World.java:375) at aaq.a(WorldProvider.java:100) at in.b(WorldServer.java:775) at in.a(WorldServer.java:739) at yc.<init>(World.java:288) at in.<init>(WorldServer.java:103) at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:266) at ho.c(DedicatedServer.java:180) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:458) at fy.run(SourceFile:849)