[Server thread/WARN] [net.minecraft.entity.EntityType/]: Exception loading entity: 
net.minecraft.crash.ReportedException: Loading entity NBT
	at net.minecraft.entity.Entity.func_70020_e(Entity.java:1506) ~[?:?]
	at net.minecraft.entity.EntityType.lambda$loadEntityUnchecked$1(EntityType.java:425) ~[?:?]
	at net.minecraft.util.Util.func_215077_a(SourceFile:327) ~[?:?]
	at net.minecraft.entity.EntityType.func_220330_a(EntityType.java:422) ~[?:?]
	at net.minecraft.entity.EntityType.func_220343_b(EntityType.java:470) ~[?:?]
	at net.minecraft.entity.EntityType.func_220335_a(EntityType.java:452) ~[?:?]
	at net.minecraft.command.impl.SummonCommand.func_198737_a(SourceFile:66) ~[?:?]
	at net.minecraft.command.impl.SummonCommand.func_198738_c(SourceFile:40) ~[?:?]
	at com.mojang.brigadier.CommandDispatcher.execute(CommandDispatcher.java:262) ~[brigadier-1.0.17.jar:?]
	at net.minecraft.command.Commands.func_197059_a(Commands.java:194) ~[?:?]
	at net.minecraft.network.play.ServerPlayNetHandler.func_147361_d(ServerPlayNetHandler.java:981) ~[?:?]
	at net.minecraft.network.play.ServerPlayNetHandler.func_147354_a(ServerPlayNetHandler.java:964) ~[?:?]
	at net.minecraft.network.play.client.CChatMessagePacket.func_148833_a(SourceFile:37) ~[?:?]
	at net.minecraft.network.play.client.CChatMessagePacket.func_148833_a(SourceFile:9) ~[?:?]
	at net.minecraft.network.PacketThreadUtil.func_225383_a(SourceFile:21) ~[?:?]
	at net.minecraft.util.concurrent.TickDelayedTask.run(SourceFile:18) [?:?]
	at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213166_h(SourceFile:144) [?:?]
	at net.minecraft.util.concurrent.RecursiveEventLoop.func_213166_h(SourceFile:23) [?:?]
	at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213168_p(SourceFile:118) [?:?]
	at net.minecraft.server.MinecraftServer.func_213205_aW(MinecraftServer.java:699) [?:?]
	at net.minecraft.server.MinecraftServer.func_213168_p(MinecraftServer.java:693) [?:?]
	at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213161_c(SourceFile:127) [?:?]
	at net.minecraft.server.MinecraftServer.func_213202_o(MinecraftServer.java:679) [?:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:626) [?:?]
	at java.lang.Thread.run(Unknown Source) [?:1.8.0_181]
Caused by: java.lang.BootstrapMethodError: call site initialization exception
	at java.lang.invoke.CallSite.makeSite(Unknown Source) ~[?:1.8.0_181]
	at java.lang.invoke.MethodHandleNatives.linkCallSiteImpl(Unknown Source) ~[?:1.8.0_181]
	at java.lang.invoke.MethodHandleNatives.linkCallSite(Unknown Source) ~[?:1.8.0_181]
	at net.minecraft.entity.Entity.func_85029_a(Entity.java:2186) ~[?:?]
	at net.minecraft.entity.Entity.func_70020_e(Entity.java:1505) ~[?:?]
	at vazkii.quark.tools.entity.PickarangEntity.func_70037_a(PickarangEntity.java:312) ~[?:beta-2.0-181]
	at net.minecraft.entity.Entity.func_70020_e(Entity.java:1491) ~[?:?]
	at vazkii.quark.tools.entity.PickarangEntity.func_70037_a(PickarangEntity.java:312) ~[?:beta-2.0-181]
	at net.minecraft.entity.Entity.func_70020_e(Entity.java:1491) ~[?:?]
[about 1000 lines repeating the last two...]
Caused by: java.lang.StackOverflowError
	at jdk.internal.org.objectweb.asm.MethodWriter.<init>(Unknown Source) ~[?:1.8.0_181]
	at jdk.internal.org.objectweb.asm.ClassWriter.visitMethod(Unknown Source) ~[?:1.8.0_181]
	at java.lang.invoke.InnerClassLambdaMetafactory.generateConstructor(Unknown Source) ~[?:1.8.0_181]
	at java.lang.invoke.InnerClassLambdaMetafactory.spinInnerClass(Unknown Source) ~[?:1.8.0_181]
	at java.lang.invoke.InnerClassLambdaMetafactory.buildCallSite(Unknown Source) ~[?:1.8.0_181]
	at java.lang.invoke.LambdaMetafactory.metafactory(Unknown Source) ~[?:1.8.0_181]
	at java.lang.invoke.CallSite.makeSite(Unknown Source) ~[?:1.8.0_181]
	at java.lang.invoke.MethodHandleNatives.linkCallSiteImpl(Unknown Source) ~[?:1.8.0_181]
	at java.lang.invoke.MethodHandleNatives.linkCallSite(Unknown Source) ~[?:1.8.0_181]
	at net.minecraft.entity.Entity.func_85029_a(Entity.java:2186) ~[?:?]
	at net.minecraft.entity.Entity.func_70020_e(Entity.java:1505) ~[?:?]
	at vazkii.quark.tools.entity.PickarangEntity.func_70037_a(PickarangEntity.java:312) ~[?:beta-2.0-181]
	at net.minecraft.entity.Entity.func_70020_e(Entity.java:1491) ~[?:?]
[about 1000 lines repeating the last two, again...]
[Server thread/WARN] [net.minecraft.server.MinecraftServer/]: Can't keep up! Is the server overloaded? Running 5604ms or 112 ticks behind
[Client thread/INFO] [net.minecraft.client.gui.NewChatGui/]: [CHAT] Unable to summon entity