[16:02:06] [Server thread/ERROR]: null
 org.bukkit.command.CommandException: Unhandled exception executing command 'crates' in plugin AdvancedCrates v3.3.3
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47) ~[forge:?]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:156) ~[forge:?]
        at org.bukkit.craftbukkit.v1_16_R3.CraftServer.dispatchCommand(CraftServer.java:680) ~[forge:1.16.5-6d6b2d34]
        at net.minecraft.network.play.ServerPlayNetHandler.func_147361_d(ServerPlayNetHandler.java:1788) ~[?:?]
        at net.minecraft.network.play.ServerPlayNetHandler.func_244548_c(ServerPlayNetHandler.java:1650) ~[?:?]
        at net.minecraft.network.play.ServerPlayNetHandler.func_147354_a(ServerPlayNetHandler.java:1604) ~[?:?]
        at net.minecraft.network.play.client.CChatMessagePacket.func_148833_a(CChatMessagePacket.java:38) ~[?:?]
        at net.minecraft.network.play.client.CChatMessagePacket.func_148833_a(CChatMessagePacket.java:8) ~[?:?]
        at net.minecraft.network.PacketThreadUtil.func_225383_a(PacketThreadUtil.java:22) ~[?:?]
        at net.minecraft.util.concurrent.TickDelayedTask.run(SourceFile:18) ~[?:?]
        at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213166_h(SourceFile:144) ~[?:?]
        at net.minecraft.util.concurrent.RecursiveEventLoop.func_213166_h(SourceFile:23) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:886) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:169) ~[?:?]
        at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213168_p(SourceFile:118) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_213205_aW(MinecraftServer.java:869) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_213168_p(MinecraftServer.java:863) ~[?:?]
        at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213161_c(SourceFile:127) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_213202_o(MinecraftServer.java:849) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_240802_v_(MinecraftServer.java:781) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_240783_a_(MinecraftServer.java:265) ~[?:?]
        at java.lang.Thread.run(Thread.java:829) [?:?]
Caused by: java.lang.NullPointerException
        at me.PM2.AdvancedCrates.MonthlyCrate.F(MonthlyCrate.java:479) ~[?:?]
        at me.PM2.AdvancedCrates.commands.MCrateCommand.onCommand(MCrateCommand.java:1131) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[forge:?]
        ... 21 more