What is your Quests version / build number (do not say "latest")?
5.0.6-b491
Describe the problem and how to replicate it.
run /quest command when quest is activated.
Any console errors to share?
[23:18:24 ERROR]: Command exception: /quest
org.bukkit.command.CommandException: Unhandled exception executing command 'quest' in plugin Quests v5.0.6-b491
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47) ~[paper-mojangapi-1.21-R0.1-SNAPSHOT.jar:?]
at io.papermc.paper.command.brigadier.bukkit.BukkitCommandNode$BukkitBrigCommand.run(BukkitCommandNode.java:91) ~[purpur-1.21.jar:1.21-2272-b2d1fea]
at com.mojang.brigadier.context.ContextChain.runExecutable(ContextChain.java:73) ~[brigadier-1.2.9.jar:?]
at net.minecraft.commands.execution.tasks.ExecuteCommand.execute(ExecuteCommand.java:30) ~[purpur-1.21.jar:1.21-2272-b2d1fea]
at net.minecraft.commands.execution.tasks.ExecuteCommand.execute(ExecuteCommand.java:13) ~[purpur-1.21.jar:1.21-2272-b2d1fea]
at net.minecraft.commands.execution.UnboundEntryAction.lambda$bind$0(UnboundEntryAction.java:8) ~[purpur-1.21.jar:1.21-2272-b2d1fea]
at net.minecraft.commands.execution.CommandQueueEntry.execute(CommandQueueEntry.java:5) ~[purpur-1.21.jar:1.21-2272-b2d1fea]
at net.minecraft.commands.execution.ExecutionContext.runCommandQueue(ExecutionContext.java:103) ~[purpur-1.21.jar:1.21-2272-b2d1fea]
at net.minecraft.commands.Commands.executeCommandInContext(Commands.java:451) ~[purpur-1.21.jar:1.21-2272-b2d1fea]
at net.minecraft.commands.Commands.performCommand(Commands.java:358) ~[purpur-1.21.jar:1.21-2272-b2d1fea]
at net.minecraft.commands.Commands.performCommand(Commands.java:345) ~[purpur-1.21.jar:1.21-2272-b2d1fea]
at net.minecraft.commands.Commands.performCommand(Commands.java:340) ~[purpur-1.21.jar:1.21-2272-b2d1fea]
at net.minecraft.server.network.ServerGamePacketListenerImpl.performUnsignedChatCommand(ServerGamePacketListenerImpl.java:2226) ~[purpur-1.21.jar:1.21-2272-b2d1fea]
at net.minecraft.server.network.ServerGamePacketListenerImpl.handleCommand(ServerGamePacketListenerImpl.java:2503) ~[purpur-1.21.jar:1.21-2272-b2d1fea]
at org.bukkit.craftbukkit.entity.CraftPlayer.chat(CraftPlayer.java:760) ~[purpur-1.21.jar:1.21-2272-b2d1fea]
at DecentHolograms-2.8.9.jar/eu.decentsoftware.holograms.api.actions.ActionType$3.lambda$execute$0(ActionType.java:71) ~[DecentHolograms-2.8.9.jar:?]
at org.bukkit.craftbukkit.scheduler.CraftTask.run(CraftTask.java:86) ~[purpur-1.21.jar:1.21-2272-b2d1fea]
at org.bukkit.craftbukkit.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:475) ~[purpur-1.21.jar:1.21-2272-b2d1fea]
at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1761) ~[purpur-1.21.jar:1.21-2272-b2d1fea]
at net.minecraft.server.dedicated.DedicatedServer.tickChildren(DedicatedServer.java:509) ~[purpur-1.21.jar:1.21-2272-b2d1fea]
at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1633) ~[purpur-1.21.jar:1.21-2272-b2d1fea]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1333) ~[purpur-1.21.jar:1.21-2272-b2d1fea]
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:333) ~[purpur-1.21.jar:1.21-2272-b2d1fea]
at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]
Caused by: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
at java.base/java.util.LinkedList.checkElementIndex(LinkedList.java:566) ~[?:?]
at java.base/java.util.LinkedList.get(LinkedList.java:487) ~[?:?]
at Quests-5.0.6.jar/me.pikamug.quests.player.BukkitQuester.getCurrentObjectives(BukkitQuester.java:1263) ~[Quests-5.0.6.jar:?]
at Quests-5.0.6.jar/me.pikamug.quests.player.BukkitQuester.showCurrentObjectives(BukkitQuester.java:1588) ~[Quests-5.0.6.jar:?]
at Quests-5.0.6.jar/me.pikamug.quests.commands.quest.BukkitQuestCommandHandler.check(BukkitQuestCommandHandler.java:55) ~[Quests-5.0.6.jar:?]
at Quests-5.0.6.jar/me.pikamug.quests.listeners.BukkitCommandManager.onCommand(BukkitCommandManager.java:49) ~[Quests-5.0.6.jar:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[paper-mojangapi-1.21-R0.1-SNAPSHOT.jar:?]
... 23 more
If applicable, can you provide an example quest from quests.yml?
What is your Quests version / build number (do not say "latest")?
5.0.6-b491
Describe the problem and how to replicate it.
run /quest command when quest is activated.
Any console errors to share?
If applicable, can you provide an example quest from quests.yml?