[18:27:08 INFO]: guifu issued server command: /mp_start_vote
[18:27:08 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'mp_start_vote' in plugin MineralContest v1.5.2
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47) ~[patched_1.15.2.jar:git-Paper-146]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:159) ~[patched_1.15.2.jar:git-Paper-146]
        at org.bukkit.craftbukkit.v1_15_R1.CraftServer.dispatchCommand(CraftServer.java:752) ~[patched_1.15.2.jar:git-Paper-146]
        at net.minecraft.server.v1_15_R1.PlayerConnection.handleCommand(PlayerConnection.java:1825) ~[patched_1.15.2.jar:git-Paper-146]
        at net.minecraft.server.v1_15_R1.PlayerConnection.a(PlayerConnection.java:1633) ~[patched_1.15.2.jar:git-Paper-146]
        at net.minecraft.server.v1_15_R1.PacketPlayInChat.a(PacketPlayInChat.java:47) ~[patched_1.15.2.jar:git-Paper-146]
        at net.minecraft.server.v1_15_R1.PacketPlayInChat.a(PacketPlayInChat.java:5) ~[patched_1.15.2.jar:git-Paper-146]
        at net.minecraft.server.v1_15_R1.PlayerConnectionUtils.lambda$ensureMainThread$0(PlayerConnectionUtils.java:23) ~[patched_1.15.2.jar:git-Paper-146]
        at net.minecraft.server.v1_15_R1.TickTask.run(SourceFile:18) ~[patched_1.15.2.jar:git-Paper-146]
        at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.executeTask(IAsyncTaskHandler.java:136) ~[patched_1.15.2.jar:git-Paper-146]
        at net.minecraft.server.v1_15_R1.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23) ~[patched_1.15.2.jar:git-Paper-146]
        at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.executeNext(IAsyncTaskHandler.java:109) ~[patched_1.15.2.jar:git-Paper-146]
        at net.minecraft.server.v1_15_R1.MinecraftServer.ba(MinecraftServer.java:1038) ~[patched_1.15.2.jar:git-Paper-146]
        at net.minecraft.server.v1_15_R1.MinecraftServer.executeNext(MinecraftServer.java:1031) ~[patched_1.15.2.jar:git-Paper-146]
        at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.awaitTasks(IAsyncTaskHandler.java:119) ~[patched_1.15.2.jar:git-Paper-146]
        at net.minecraft.server.v1_15_R1.MinecraftServer.sleepForTick(MinecraftServer.java:1015) ~[patched_1.15.2.jar:git-Paper-146]
        at net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:938) ~[patched_1.15.2.jar:git-Paper-146]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_242]
Caused by: java.lang.ClassCastException: org.bukkit.craftbukkit.v1_15_R1.block.CraftBlockState cannot be cast to org.bukkit.block.Chest
        at fr.mineral.Core.Arena.Coffre.clear(Coffre.java:31) ~[?:?]
        at fr.mineral.Core.House.clearHouse(House.java:42) ~[?:?]
        at fr.mineral.Core.Game.clear(Game.java:234) ~[?:?]
        at fr.mineral.Commands.CVAR.mp_start_vote.onCommand(mp_start_vote.java:19) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[patched_1.15.2.jar:git-Paper-146]
        ... 17 more