incompatible with multiplayer

[1tsukusu]

when my friend got rid of all of his limbs (in mutliplayer world), died, and tried to respawn, he crashed

java.lang.NoClassDefFoundError: com/google/gson/internal/$Gson$Preconditions
at com.mr208.rewired.client.ReWIREDEssentialsMissingHandlerClient.firstNonNull(ReWIREDEssentialsMissingHandlerClient.java:404)
at com.mr208.rewired.client.ReWIREDEssentialsMissingHandlerClient.renderItemInFirstPerson(ReWIREDEssentialsMissingHandlerClient.java:413)
at com.mr208.rewired.client.ReWIREDEssentialsMissingHandlerClient.handleRenderHand(ReWIREDEssentialsMissingHandlerClient.java:397)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:79)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:204)
at net.minecraftforge.client.ForgeHooksClient.renderFirstPersonHand(ForgeHooksClient.java:199)
at net.minecraft.client.renderer.EntityRenderer.func_78476_b(MixinEntityRendererPreventShaders.java:818)
at net.minecraft.client.renderer.EntityRenderer.func_175068_a(MixinEntityRendererPreventShaders.java:1550)
at net.minecraft.client.renderer.EntityRenderer.func_78471_a(MixinEntityRendererPreventShaders.java:1332)
at net.minecraft.client.renderer.EntityRenderer.func_181560_a(MixinEntityRendererPreventShaders.java:1120)
at net.minecraft.client.Minecraft.func_71411_J(MinecraftMixin.java:1109)
at net.minecraft.client.Minecraft.func_99999_d(MinecraftMixin.java:6664)
at net.minecraft.client.main.Main.main(SourceFile:123)
at top.outlands.foundation.LaunchHandler.launch(LaunchHandler.java:125)
at top.outlands.foundation.boot.Foundation.main(Foundation.java:43)
at com.cleanroommc.relauncher.wrapper.RelaunchMainWrapper.main(RelaunchMainWrapper.java:20)
Caused by: java.lang.ClassNotFoundException: com.google.gson.internal.$Gson$Preconditions
... 16 more