[Game Crash When i want join to skyfactory 2.5]

when i want to join skyfactory 2.5 server game crash

crash log :

Description: Unexpected error

java.lang.IllegalArgumentException: Could not get provider type for dimension 8, does not exist
    at net.minecraftforge.common.DimensionManager.getProviderType(DimensionManager.java:148)
    at net.minecraftforge.common.DimensionManager.createProviderFor(DimensionManager.java:302)
    at net.minecraft.world.WorldProvider.func_76570_a(WorldProvider.java:160)
    at net.minecraft.client.multiplayer.WorldClient.<init>(WorldClient.java:54)
    at net.minecraft.client.network.NetHandlerPlayClient.func_147282_a(NetHandlerPlayClient.java:238)
    at net.minecraft.network.play.server.S01PacketJoinGame.func_148833_a(SourceFile:70)
    at net.minecraft.network.play.server.S01PacketJoinGame.func_148833_a(SourceFile:13)
    at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212)
    at net.minecraft.client.multiplayer.PlayerControllerMP.func_78765_e(PlayerControllerMP.java:273)
    at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1602)
    at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:973)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:898)
    at net.minecraft.client.main.Main.main(SourceFile:148)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

 

i search it on internet but i cant find any fix , its server-side
any solution ???