Running server with latest forge version (at time of writing: forge-1.7.10-10.13.2.1236-universal)
CoFH version: 3.0.0B6-32, does the same thing with 3.0.0B8-36

Output from server:
[14:58:11] [Server thread/ERROR]: Encountered an unexpected exception
java.lang.NoClassDefFoundError: cofh/api/energy/IEnergyReceiver
at mekanism.common.util.CableUtils.isEnergyAcceptor(CableUtils.java:55) ~[CableUtils.class:?]
at mekanism.common.util.CableUtils.getConnectedEnergyAcceptors(CableUtils.java:44) ~[CableUtils.class:?]
at mekanism.common.EnergyNetwork.refresh(EnergyNetwork.java:321) ~[EnergyNetwork.class:?]
at mekanism.api.transmitters.DynamicNetwork.fullRefresh(DynamicNetwork.java:97) ~[DynamicNetwork.class:?]
at mekanism.common.multipart.PartTransmitter.getTransmitterNetwork(PartTransmitter.java:113) ~[PartTransmitter.class:?]
at mekanism.common.multipart.PartTransmitter.getTransmitterNetwork(PartTransmitter.java:86) ~[PartTransmitter.class:?]
at mekanism.common.multipart.PartTransmitter.refreshTransmitterNetwork(PartTransmitter.java:43) ~[PartTransmitter.class:?]
at TGridTransmitter$$5$class.refreshTransmitterNetwork(Unknown Source) ~[?:?]
at TileMultipart_cmp$$16.refreshTransmitterNetwork(Unknown Source) ~[?:?]
at mekanism.api.transmitters.TransmitterNetworkRegistry$NetworkLoader.refreshChunk(TransmitterNetworkRegistry.java:150) ~[Transmit$
at mekanism.api.transmitters.TransmitterNetworkRegistry$NetworkLoader.onChunkLoad(TransmitterNetworkRegistry.java:132) ~[Transmitt$
at cpw.mods.fml.common.eventhandler.ASMEventHandler_134_NetworkLoader_onChunkLoad_Load.invoke(.dynamic) ~[?:?]
at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:51) ~[ASMEventHandler.class:git-Cauldron-MCPC-Plus$
at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:122) ~[EventBus.class:git-Cauldron-MCPC-Plus-1.7.10-1.1207.01.188]
at net.minecraft.world.chunk.Chunk.func_76631_c(Chunk.java:1019) ~[apx.class:?]
at net.minecraftforge.common.chunkio.ChunkIOProvider.callStage2(ChunkIOProvider.java:49) ~[ChunkIOProvider.class:git-Cauldron-MCPC$
at net.minecraftforge.common.chunkio.ChunkIOProvider.callStage2(ChunkIOProvider.java:15) ~[ChunkIOProvider.class:git-Cauldron-MCPC$
at net.minecraftforge.common.util.AsynchronousExecutor.skipQueue(AsynchronousExecutor.java:344) ~[AsynchronousExecutor.class:git-C$
at net.minecraftforge.common.util.AsynchronousExecutor.getSkipQueue(AsynchronousExecutor.java:302) ~[AsynchronousExecutor.class:gi$
at net.minecraftforge.common.chunkio.ChunkIOExecutor.syncChunkLoad(ChunkIOExecutor.java:12) ~[ChunkIOExecutor.class:git-Cauldron-M$
at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:164) ~[ms.class:?]
at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:137) ~[ms.class:?]
at net.minecraft.world.gen.ChunkProviderServer.func_73154_d(ChunkProviderServer.java:260) ~[ms.class:?]
at net.minecraft.world.World.func_72964_e(World.java:744) ~[ahb.class:?]
at net.minecraft.world.World.func_147438_o(World.java:3115) ~[ahb.class:?]

    at powercrystals.minefactoryreloaded.net.CommonProxy.loadTicket(CommonProxy.java:38) ~[CommonProxy.class:?]
    at powercrystals.minefactoryreloaded.net.CommonProxy.ticketsLoaded(CommonProxy.java:54) ~[CommonProxy.class:?]
    at net.minecraftforge.common.ForgeChunkManager.loadWorld(ForgeChunkManager.java:540) ~[ForgeChunkManager.class:git-Cauldron-MCPC-P$
    at net.minecraftforge.common.ForgeInternalHandler.onDimensionLoad(ForgeInternalHandler.java:64) ~[ForgeInternalHandler.class:git-C$
    at cpw.mods.fml.common.eventhandler.ASMEventHandler_1_ForgeInternalHandler_onDimensionLoad_Load.invoke(.dynamic) ~[?:?]
    at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:51) ~[ASMEventHandler.class:git-Cauldron-MCPC-Plus$
    at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:122) ~[EventBus.class:git-Cauldron-MCPC-Plus-1.7.10-1.1207.01.188]
    at net.minecraft.server.MinecraftServer.func_71247_a(MinecraftServer.java:431) ~[MinecraftServer.class:?]
    at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:329) ~[lt.class:?]
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:620) [MinecraftServer.class:?]
    at java.lang.Thread.run(Thread.java:745) [?:1.7.0_71]

Caused by: java.lang.ClassNotFoundException: cofh.api.energy.IEnergyReceiver
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:188) ~[launchwrapper-1.9.jar:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:425) ~[?:1.7.0_71]
at java.lang.ClassLoader.loadClass(ClassLoader.java:358) ~[?:1.7.0_71]
... 36 more
Caused by: java.lang.NullPointerException
[14:58:11] [Server thread/ERROR]: Cause of unexpected exception was
java.lang.ClassNotFoundException: cofh.api.energy.IEnergyReceiver

Something probably being bad and shipping an old version of cofh api. Try deleting cofh folders from any non-cofh mods that have one