I get this message in the log which leads me to believe that JER is not compatible with More Villagers. Am I just being stupid, or is it really not working? (I'm bad with logs and stuff)

Failed loading villager netherian registered at netherian
15:16:20.413
jeresources
Render thread
Exception caught when registering villager
java.lang.NullPointerException: Cannot invoke "net.minecraft.world.entity.Entity.m_9236_()" because "trader" is null
at TRANSFORMER/[email protected]/net.minecraft.world.entity.npc.VillagerTrades$TreasureMapForEmeralds.handler$zom000$turnToQuill(VillagerTrades.java:989)
at TRANSFORMER/[email protected]/net.minecraft.world.entity.npc.VillagerTrades$TreasureMapForEmeralds.m_213663_(VillagerTrades.java)
at TRANSFORMER/[email protected]/jeresources.collection.TradeList.addMerchantRecipe(TradeList.java:58)
at TRANSFORMER/[email protected]/jeresources.collection.TradeList.addITradeList(TradeList.java:69)
at TRANSFORMER/[email protected]/jeresources.entry.AbstractVillagerEntry.addITradeLists(AbstractVillagerEntry.java:29)
at TRANSFORMER/[email protected]/jeresources.entry.AbstractVillagerEntry.(AbstractVillagerEntry.java:22)
at TRANSFORMER/[email protected]/jeresources.entry.VillagerEntry.(VillagerEntry.java:19)
at TRANSFORMER/[email protected]/jeresources.util.VillagersHelper.initRegistry(VillagersHelper.java:23)
at TRANSFORMER/[email protected]/jeresources.compatibility.Compatibility.init(Compatibility.java:33)
at TRANSFORMER/[email protected]/jeresources.proxy.CommonProxy.initCompatibility(CommonProxy.java:14)
at TRANSFORMER/[email protected]/jeresources.jei.JEIConfig.registerCategories(JEIConfig.java:98)
at TRANSFORMER/[email protected]/mezz.jei.library.load.PluginLoader.lambda$createRecipeCategories$3(PluginLoader.java:91)
at TRANSFORMER/[email protected]/mezz.jei.library.load.PluginCaller.callOnPlugins(PluginCaller.java:27)
at TRANSFORMER/[email protected]/mezz.jei.library.load.PluginLoader.createRecipeCategories(PluginLoader.java:91)
at TRANSFORMER/[email protected]/mezz.jei.library.load.PluginLoader.createRecipeManager(PluginLoader.java:120)
at TRANSFORMER/[email protected]/mezz.jei.library.startup.JeiStarter.start(JeiStarter.java:132)
at TRANSFORMER/[email protected]/mezz.jei.forge.startup.StartEventObserver.transitionState(StartEventObserver.java:137)
at TRANSFORMER/[email protected]/mezz.jei.forge.startup.StartEventObserver.onEvent(StartEventObserver.java:100)
at MC-BOOTSTRAP/net.minecraftforge.eventbus/net.minecraftforge.eventbus.EventBus.doCastFilter(EventBus.java:260)
at MC-BOOTSTRAP/net.minecraftforge.eventbus/net.minecraftforge.eventbus.EventBus.lambda$addListener$11(EventBus.java:252)
at MC-BOOTSTRAP/net.minecraftforge.eventbus/net.minecraftforge.eventbus.EventBus.post(EventBus.java:315)
at MC-BOOTSTRAP/net.minecraftforge.eventbus/net.minecraftforge.eventbus.EventBus.post(EventBus.java:296)
at TRANSFORMER/[email protected]/net.minecraft.client.multiplayer.ClientPacketListener.m_5859_(ClientPacketListener.java:1451)
at TRANSFORMER/[email protected]/net.minecraft.network.protocol.game.ClientboundUpdateTagsPacket.m_5797_(ClientboundUpdateTagsPacket.java:35)
at TRANSFORMER/[email protected]/net.minecraft.network.protocol.game.ClientboundUpdateTagsPacket.m_5797_(ClientboundUpdateTagsPacket.java:11)
at TRANSFORMER/[email protected]/net.minecraft.network.protocol.PacketUtils.m_263899_(PacketUtils.java:22)
at TRANSFORMER/[email protected]/net.minecraft.util.thread.BlockableEventLoop.m_6367_(BlockableEventLoop.java:156)
at TRANSFORMER/[email protected]/net.minecraft.util.thread.ReentrantBlockableEventLoop.m_6367_(ReentrantBlockableEventLoop.java:23)
at TRANSFORMER/[email protected]/net.minecraft.util.thread.BlockableEventLoop.m_7245_(BlockableEventLoop.java:130)
at TRANSFORMER/[email protected]/net.minecraft.util.thread.BlockableEventLoop.m_18699_(BlockableEventLoop.java:115)
at TRANSFORMER/[email protected]/net.minecraft.client.Minecraft.m_91383_(Minecraft.java:1106)
at TRANSFORMER/[email protected]/net.minecraft.client.Minecraft.m_91374_(Minecraft.java:718)
at TRANSFORMER/[email protected]/net.minecraft.client.main.Main.main(Main.java:218)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at MC-BOOTSTRAP/[email protected]/net.minecraftforge.fml.loading.targets.CommonLaunchHandler.runTarget(CommonLaunchHandler.java:111)
at MC-BOOTSTRAP/[email protected]/net.minecraftforge.fml.loading.targets.CommonLaunchHandler.clientService(CommonLaunchHandler.java:99)
at MC-BOOTSTRAP/[email protected]/net.minecraftforge.fml.loading.targets.CommonClientLaunchHandler.lambda$makeService$0(CommonClientLaunchHandler.java:25)
at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:30)
at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:53)
at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:71)
at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.Launcher.run(Launcher.java:108)
at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.Launcher.main(Launcher.java:78)
at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26)
at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23)
at [email protected]/cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:141)