Good plugin but I have error.

[11:02:08] [Server thread/INFO]: Dewersee issued server command: /customemojis:emoji
[11:02:10] [Server thread/ERROR]: Could not pass event InventoryClickEvent to CustomEmojis v1.0
org.bukkit.command.CommandException: Unhandled exception executing command 'emoji' in plugin CustomEmojis v1.0
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47) ~[paper-api-1.20.4-R0.1-SNAPSHOT.jar:?]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:155) ~[paper-api-1.20.4-R0.1-SNAPSHOT.jar:?]
at org.bukkit.craftbukkit.v1_20_R3.CraftServer.dispatchCommand(CraftServer.java:999) ~[paper-1.20.4.jar:git-Paper-462]
at org.bukkit.Bukkit.dispatchCommand(Bukkit.java:1094) ~[paper-api-1.20.4-R0.1-SNAPSHOT.jar:?]
at customemojis.InventoryListener.onClick(InventoryListener.java:63) ~[CustomEmojis.jar:?]
at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor512.execute(Unknown Source) ~[?:?]
at org.bukkit.plugin.EventExecutor$2.execute(EventExecutor.java:77) ~[paper-api-1.20.4-R0.1-SNAPSHOT.jar:?]
at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:77) ~[paper-api-1.20.4-R0.1-SNAPSHOT.jar:git-Paper-462]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[paper-api-1.20.4-R0.1-SNAPSHOT.jar:?]
at io.papermc.paper.plugin.manager.PaperEventManager.callEvent(PaperEventManager.java:54) ~[paper-1.20.4.jar:git-Paper-462]
at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.callEvent(PaperPluginManagerImpl.java:126) ~[paper-1.20.4.jar:git-Paper-462]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:615) ~[paper-api-1.20.4-R0.1-SNAPSHOT.jar:?]
at net.minecraft.server.network.ServerGamePacketListenerImpl.handleContainerClick(ServerGamePacketListenerImpl.java:3106) ~[?:?]
at net.minecraft.network.protocol.game.ServerboundContainerClickPacket.handle(ServerboundContainerClickPacket.java:58) ~[?:?]
at net.minecraft.network.protocol.game.ServerboundContainerClickPacket.handle(ServerboundContainerClickPacket.java:23) ~[?:?]
at net.minecraft.network.protocol.PacketUtils.lambda$ensureRunningOnSameThread$0(PacketUtils.java:54) ~[?:?]
at net.minecraft.server.TickTask.run(TickTask.java:18) ~[paper-1.20.4.jar:git-Paper-462]
at net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:153) ~[?:?]
at net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:24) ~[?:?]
at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:1465) ~[paper-1.20.4.jar:git-Paper-462]
at net.minecraft.server.MinecraftServer.d(MinecraftServer.java:194) ~[paper-1.20.4.jar:git-Paper-462]
at net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:126) ~[?:?]
at net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:1442) ~[paper-1.20.4.jar:git-Paper-462]
at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:1365) ~[paper-1.20.4.jar:git-Paper-462]
at net.minecraft.util.thread.BlockableEventLoop.managedBlock(BlockableEventLoop.java:136) ~[?:?]
at net.minecraft.server.MinecraftServer.waitUntilNextTick(MinecraftServer.java:1343) ~[paper-1.20.4.jar:git-Paper-462]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1232) ~[paper-1.20.4.jar:git-Paper-462]
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:319) ~[paper-1.20.4.jar:git-Paper-462]
at java.lang.Thread.run(Thread.java:1583) ~[?:?]
Caused by: java.lang.NullPointerException: Cannot invoke "String.length()" because "replacement" is null
at java.util.regex.Matcher.appendExpandedReplacement(Matcher.java:1060) ~[?:?]
at java.util.regex.Matcher.appendReplacement(Matcher.java:1043) ~[?:?]
at java.util.regex.Matcher.replaceAll(Matcher.java:1229) ~[?:?]
at java.lang.String.replaceAll(String.java:3069) ~[?:?]
at customemojis.CustomEmojis.listEmojis(CustomEmojis.java:287) ~[CustomEmojis.jar:?]
at customemojis.Comando.onCommand(Comando.java:65) ~[CustomEmojis.jar:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[paper-api-1.20.4-R0.1-SNAPSHOT.jar:?]
... 28 more

it would be great if emojies work by default and didnt require permission to use it