[12:03:46] [Server thread/WARN] [minecraft/EntityType]: Exception loading entity: 
java.lang.IllegalArgumentException: Unregistered serializer net.minecraft.network.syncher.EntityDataSerializer$$Lambda/0x0000000800a94c00@6e53e980 for 21!
	at TRANSFORMER/[email protected]/net.minecraft.network.syncher.SynchedEntityData$Builder.define(SynchedEntityData.java:157) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading}
	at TRANSFORMER/[email protected]/com.mraof.minestuck.entity.FrogEntity.defineSynchedData(FrogEntity.java:80) ~[Minestuck-1.21.1-1.13.0.1.jar%23187!/:1.21.1-1.13.0.1] {re:classloading}
	at TRANSFORMER/[email protected]/net.minecraft.world.entity.Entity.<init>(Entity.java:266) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading,pl:accesstransformer:B,re:mixin,pl:accesstransformer:B}
	at TRANSFORMER/[email protected]/net.minecraft.world.entity.LivingEntity.<init>(LivingEntity.java:267) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.minestuck.json:LivingEntityMixin from mod (unknown),pl:mixin:A}
	at TRANSFORMER/[email protected]/net.minecraft.world.entity.Mob.<init>(Mob.java:139) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading,pl:accesstransformer:B}
	at TRANSFORMER/[email protected]/net.minecraft.world.entity.PathfinderMob.<init>(PathfinderMob.java:17) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading}
	at TRANSFORMER/[email protected]/com.mraof.minestuck.entity.FrogEntity.<init>(FrogEntity.java:70) ~[Minestuck-1.21.1-1.13.0.1.jar%23187!/:1.21.1-1.13.0.1] {re:classloading}
	at TRANSFORMER/[email protected]/net.minecraft.world.entity.EntityType.create(EntityType.java:1097) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading,xf:fml:default}
	at TRANSFORMER/[email protected]/net.minecraft.world.entity.EntityType.lambda$create$4(EntityType.java:1102) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading,xf:fml:default}
	at java.base/java.util.Optional.map(Optional.java:260) ~[?:?] {}
	at TRANSFORMER/[email protected]/net.minecraft.world.entity.EntityType.create(EntityType.java:1102) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading,xf:fml:default}
	at TRANSFORMER/[email protected]/net.minecraft.world.entity.EntityType.loadStaticEntity(EntityType.java:1180) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading,xf:fml:default}
	at TRANSFORMER/[email protected]/net.minecraft.world.entity.EntityType.loadEntityRecursive(EntityType.java:1134) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading,xf:fml:default}
	at TRANSFORMER/[email protected]/net.minecraft.server.commands.SummonCommand.createEntity(SummonCommand.java:67) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading,xf:fml:default}
	at TRANSFORMER/[email protected]/net.minecraft.server.commands.SummonCommand.spawnEntity(SummonCommand.java:86) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading,xf:fml:default}
	at TRANSFORMER/[email protected]/net.minecraft.server.commands.SummonCommand.lambda$register$1(SummonCommand.java:44) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading,xf:fml:default}
	at MC-BOOTSTRAP/[email protected]/com.mojang.brigadier.context.ContextChain.runExecutable(ContextChain.java:73) ~[brigadier-1.3.10.jar%23121!/:?] {}
	at TRANSFORMER/[email protected]/net.minecraft.commands.execution.tasks.ExecuteCommand.execute(ExecuteCommand.java:29) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading}
	at TRANSFORMER/[email protected]/net.minecraft.commands.execution.tasks.ExecuteCommand.execute(ExecuteCommand.java:13) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading}
	at TRANSFORMER/[email protected]/net.minecraft.commands.execution.UnboundEntryAction.lambda$bind$0(UnboundEntryAction.java:8) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading}
	at TRANSFORMER/[email protected]/net.minecraft.commands.execution.CommandQueueEntry.execute(CommandQueueEntry.java:8) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading}
	at TRANSFORMER/[email protected]/net.minecraft.commands.execution.ExecutionContext.runCommandQueue(ExecutionContext.java:107) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading}
	at TRANSFORMER/[email protected]/net.minecraft.commands.Commands.executeCommandInContext(Commands.java:363) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading}
	at TRANSFORMER/[email protected]/net.minecraft.commands.Commands.performCommand(Commands.java:284) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading}
	at TRANSFORMER/[email protected]/net.minecraft.server.network.ServerGamePacketListenerImpl.performUnsignedChatCommand(ServerGamePacketListenerImpl.java:1282) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading}
	at TRANSFORMER/[email protected]/net.minecraft.server.network.ServerGamePacketListenerImpl.lambda$handleChatCommand$7(ServerGamePacketListenerImpl.java:1269) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading}
	at TRANSFORMER/[email protected]/net.minecraft.server.TickTask.run(TickTask.java:18) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading}
	at TRANSFORMER/[email protected]/net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:148) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading,pl:accesstransformer:B}
	at TRANSFORMER/[email protected]/net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:23) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading}
	at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:872) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading,pl:accesstransformer:B}
	at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:170) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading,pl:accesstransformer:B}
	at TRANSFORMER/[email protected]/net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:122) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading,pl:accesstransformer:B}
	at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:855) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading,pl:accesstransformer:B}
	at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:849) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading,pl:accesstransformer:B}
	at TRANSFORMER/[email protected]/net.minecraft.util.thread.BlockableEventLoop.managedBlock(BlockableEventLoop.java:132) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading,pl:accesstransformer:B}
	at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.managedBlock(MinecraftServer.java:821) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading,pl:accesstransformer:B}
	at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.waitUntilNextTick(MinecraftServer.java:826) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading,pl:accesstransformer:B}
	at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:712) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading,pl:accesstransformer:B}
	at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:267) ~[client-1.21.1-20240808.144430-srg.jar%23183!/:?] {re:classloading,pl:accesstransformer:B}
	at java.base/java.lang.Thread.run(Thread.java:1583) [?:?] {}```