Crash when loaded on a server

[tlitookilakin]

Description: Exception in server tick loop

net.minecraftforge.fml.common.LoaderException: java.lang.NoClassDefFoundError: net/minecraft/client/particle/Particle
    at net.minecraftforge.fml.common.LoadController.transition(LoadController.java:179)
    at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:589)
    at net.minecraftforge.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:92)
    at net.minecraftforge.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:321)
    at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:118)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:429)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NoClassDefFoundError: net/minecraft/client/particle/Particle
    at de.comeight.crystallogy.handler.BlockHandler.registerBlocks(BlockHandler.java:74)
    at de.comeight.crystallogy.handler.BlockHandler.preInit(BlockHandler.java:124)
    at de.comeight.crystallogy.CommonProxy.preInit(CommonProxy.java:514)
    at de.comeight.crystallogy.ServerProxy.preInit(ServerProxy.java:23)
    at de.comeight.crystallogy.CrystallogyBase.preInit(CrystallogyBase.java:32)

then further down

Caused by: java.lang.ClassNotFoundException: net.minecraft.client.particle.Particle
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 36 more

fix your proxies, mang.

[tlitookilakin]

Ah, I see this was fixed in a 1.10 version. This is still broken in 1.9, however. Any plans to backport the fix, or should I just remove the mod?

[COM8]

No, I will not fix this for MC 1.9 You should remove my mod if you'd like to play on this version.
Btw. you are able to play on 1.10 with almost all 1.9 mods.
Just give it a try if you haven't already :D