MythicMobs bug /mm s find

>.... [19:57:53 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'mm' in plugin MythicMobs v4.9.0-SNAPSHOT-3197
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47) ~[patched_1.15.1.jar:git-Paper-60]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:159) ~[patched_1.15.1.jar:git-Paper-60]
at org.bukkit.craftbukkit.v1_15_R1.CraftServer.dispatchCommand(CraftServer.java:740) ~[patched_1.15.1.jar:git-Paper-60]
at net.minecraft.server.v1_15_R1.PlayerConnection.handleCommand(PlayerConnection.java:1820) ~[patched_1.15.1.jar:git-Paper-60]
at net.minecraft.server.v1_15_R1.PlayerConnection.a(PlayerConnection.java:1628) ~[patched_1.15.1.jar:git-Paper-60]
at net.minecraft.server.v1_15_R1.PacketPlayInChat.a(PacketPlayInChat.java:47) ~[patched_1.15.1.jar:git-Paper-60]
at net.minecraft.server.v1_15_R1.PacketPlayInChat.a(PacketPlayInChat.java:5) ~[patched_1.15.1.jar:git-Paper-60]
at net.minecraft.server.v1_15_R1.PlayerConnectionUtils.lambda$ensureMainThread$0(PlayerConnectionUtils.java:23) ~[patched_1.15.1.jar:git-Paper-60]
at net.minecraft.server.v1_15_R1.PlayerConnectionUtils$$Lambda$4775/0000000088143660.run(Unknown Source) ~[?:?]
at net.minecraft.server.v1_15_R1.TickTask.run(SourceFile:18) ~[patched_1.15.1.jar:git-Paper-60]
at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.executeTask(IAsyncTaskHandler.java:136) ~[patched_1.15.1.jar:git-Paper-60]
at net.minecraft.server.v1_15_R1.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23) ~[patched_1.15.1.jar:git-Paper-60]
at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.executeNext(IAsyncTaskHandler.java:109) ~[patched_1.15.1.jar:git-Paper-60]
at net.minecraft.server.v1_15_R1.MinecraftServer.aZ(MinecraftServer.java:1037) ~[patched_1.15.1.jar:git-Paper-60]
at net.minecraft.server.v1_15_R1.MinecraftServer.executeNext(MinecraftServer.java:1030) ~[patched_1.15.1.jar:git-Paper-60]
at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.executeAll(IAsyncTaskHandler.java:95) ~[patched_1.15.1.jar:git-Paper-60]
at net.minecraft.server.v1_15_R1.MinecraftServer.a(MinecraftServer.java:1166) ~[patched_1.15.1.jar:git-Paper-60]
at net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:933) ~[patched_1.15.1.jar:git-Paper-60]
at java.lang.Thread.run(Thread.java:821) [?:1.8.0_242]
Caused by: java.lang.NullPointerException
at io.lumine.xikage.mythicmobs.commands.spawners.FindCommand.onCommand(FindCommand.java:43) ~[?:?]
at io.lumine.xikage.mythicmobs.utils.commands.Command.onCommand(Command.java:69) ~[?:?]
at io.lumine.xikage.mythicmobs.utils.commands.Command.onCommand(Command.java:60) ~[?:?]
at io.lumine.xikage.mythicmobs.utils.commands.Command.onCommand(Command.java:66) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[patched_1.15.1.jar:git-Paper-60]
... 18 more