[12:16:53 WARN]: java.lang.IllegalArgumentException: Illegal group reference: group index is missing
[12:16:53 WARN]: 	at java.base/java.util.regex.Matcher.appendExpandedReplacement(Matcher.java:1029)
[12:16:53 WARN]: 	at java.base/java.util.regex.Matcher.appendReplacement(Matcher.java:907)
[12:16:53 WARN]: 	at Citizens-2.0.33-b3320.jar//net.citizensnpcs.trait.ShopTrait$NPCShopItem.placeholders(ShopTrait.java:449)
[12:16:53 WARN]: 	at Citizens-2.0.33-b3320.jar//net.citizensnpcs.trait.ShopTrait$NPCShopItem.onClick(ShopTrait.java:408)
[12:16:53 WARN]: 	at Citizens-2.0.33-b3320.jar//net.citizensnpcs.trait.ShopTrait$NPCShopViewer.lambda$changePage$1(ShopTrait.java:782)
[12:16:53 WARN]: 	at Citizens-2.0.33-b3320.jar//net.citizensnpcs.api.gui.InventoryMenuSlot.onClick(InventoryMenuSlot.java:127)
[12:16:53 WARN]: 	at Citizens-2.0.33-b3320.jar//net.citizensnpcs.api.gui.InventoryMenu.handleClick(InventoryMenu.java:236)
[12:16:53 WARN]: 	at Citizens-2.0.33-b3320.jar//net.citizensnpcs.api.gui.InventoryMenu.onInventoryClick(InventoryMenu.java:339)
[12:16:53 WARN]: 	at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor935.execute(Unknown Source)
[12:16:53 WARN]: 	at org.bukkit.plugin.EventExecutor$2.execute(EventExecutor.java:77)
[12:16:53 WARN]: 	at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:77)
[12:16:53 WARN]: 	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70)
[12:16:53 WARN]: 	at io.papermc.paper.plugin.manager.PaperEventManager.callEvent(PaperEventManager.java:54)
[12:16:53 WARN]: 	at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.callEvent(PaperPluginManagerImpl.java:126)
[12:16:53 WARN]: 	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:617)
[12:16:53 WARN]: 	at net.minecraft.server.network.PlayerConnection.a(PlayerConnection.java:3161)
[12:16:53 WARN]: 	at net.minecraft.network.protocol.game.PacketPlayInWindowClick.a(PacketPlayInWindowClick.java:58)
[12:16:53 WARN]: 	at net.minecraft.network.protocol.game.PacketPlayInWindowClick.a(PacketPlayInWindowClick.java:23)
[12:16:53 WARN]: 	at net.minecraft.network.protocol.PlayerConnectionUtils.lambda$ensureRunningOnSameThread$0(PlayerConnectionUtils.java:54)
[12:16:53 WARN]: 	at net.minecraft.server.TickTask.run(TickTask.java:18)
[12:16:53 WARN]: 	at net.minecraft.util.thread.IAsyncTaskHandler.d(IAsyncTaskHandler.java:153)
[12:16:53 WARN]: 	at net.minecraft.util.thread.IAsyncTaskHandlerReentrant.d(IAsyncTaskHandlerReentrant.java:24)
[12:16:53 WARN]: 	at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:1488)
[12:16:53 WARN]: 	at net.minecraft.server.MinecraftServer.d(MinecraftServer.java:194)
[12:16:53 WARN]: 	at net.minecraft.util.thread.IAsyncTaskHandler.x(IAsyncTaskHandler.java:126)
[12:16:53 WARN]: 	at net.minecraft.server.MinecraftServer.bl(MinecraftServer.java:1465)
[12:16:53 WARN]: 	at net.minecraft.server.MinecraftServer.x(MinecraftServer.java:1388)
[12:16:53 WARN]: 	at net.minecraft.util.thread.IAsyncTaskHandler.bu(IAsyncTaskHandler.java:114)
[12:16:53 WARN]: 	at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:1580)
[12:16:53 WARN]: 	at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:1236)
[12:16:53 WARN]: 	at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:323)
[12:16:53 WARN]: 	at java.base/java.lang.Thread.run(Thread.java:840)