[18:51:00 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'rdshop' in plugin DailyShop v3.3
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47) ~[patched_1.17.1.jar:git-Paper-111]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:159) ~[patched_1.17.1.jar:git-Paper-111]
        at org.bukkit.craftbukkit.v1_17_R1.CraftServer.dispatchCommand(CraftServer.java:821) ~[patched_1.17.1.jar:git-Paper-111]
        at net.minecraft.server.network.ServerGamePacketListenerImpl.handleCommand(ServerGamePacketListenerImpl.java:2170) ~[?:?]
        at net.minecraft.server.network.ServerGamePacketListenerImpl.handleChat(ServerGamePacketListenerImpl.java:1981) ~[?:?]
        at net.minecraft.server.network.ServerGamePacketListenerImpl.handleChat(ServerGamePacketListenerImpl.java:1962) ~[?:?]
        at net.minecraft.network.protocol.game.ServerboundChatPacket.handle(ServerboundChatPacket.java:46) ~[?:?]
        at net.minecraft.network.protocol.game.ServerboundChatPacket.handle(ServerboundChatPacket.java:6) ~[?:?]
        at net.minecraft.network.protocol.PacketUtils.lambda$ensureRunningOnSameThread$1(PacketUtils.java:36) ~[?:?]
        at net.minecraft.server.TickTask.run(TickTask.java:18) ~[patched_1.17.1.jar:git-Paper-111]
        at net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:149) ~[?:?]
        at net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:23) ~[?:?]
        at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:1348) ~[patched_1.17.1.jar:git-Paper-111]
        at net.minecraft.server.MinecraftServer.shouldRun(MinecraftServer.java:190) ~[patched_1.17.1.jar:git-Paper-111]
        at net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:122) ~[?:?]
        at net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:1327) ~[patched_1.17.1.jar:git-Paper-111]
        at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:1320) ~[patched_1.17.1.jar:git-Paper-111]
        at net.minecraft.util.thread.BlockableEventLoop.managedBlock(BlockableEventLoop.java:132) ~[?:?]
        at net.minecraft.server.MinecraftServer.waitUntilNextTick(MinecraftServer.java:1281) ~[patched_1.17.1.jar:git-Paper-111]
        at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1192) ~[patched_1.17.1.jar:git-Paper-111]
        at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:316) ~[patched_1.17.1.jar:git-Paper-111]
        at java.lang.Thread.run(Thread.java:831) [?:?]
Caused by: java.lang.IndexOutOfBoundsException: Index 0 out of bounds for length 0
        at jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64) ~[?:?]
        at jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70) ~[?:?]
        at jdk.internal.util.Preconditions.checkIndex(Preconditions.java:266) ~[?:?]
        at java.util.Objects.checkIndex(Objects.java:359) ~[?:?]
        at java.util.ArrayList.get(ArrayList.java:427) ~[?:?]
        at io.github.divios.dailyShop.commands.add.run(add.java:62) ~[?:?]
        at io.github.divios.dailyShop.shaded.Core_lib.commands.CommandManager.lambda$onCommand$1(CommandManager.java:87) ~[?:?]
        at java.util.Optional.ifPresent(Optional.java:178) ~[?:?]
        at io.github.divios.dailyShop.shaded.Core_lib.commands.CommandManager.onCommand(CommandManager.java:69) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[patched_1.17.1.jar:git-Paper-111]
        ... 21 more