spawner

[07:06:27 INFO]: Aquarium_Nest issued server command: /spawner shop
[07:06:27 INFO]: [SpigotLib] gyurix.apeironspawner.Commands@1f47b6d3, CraftPlayer{name=Aquarium_Nest}
[07:06:27 INFO]: [SpigotLib] should, interface org.bukkit.entity.Player
[07:06:27 INFO]: [SpigotLib] is, 0, CraftPlayer
[07:06:27 INFO]: ApeironSpawner - ERROR REPORT - ArrayIndexOutOfBoundsException
0
 #1: LINE 3846 in FILE Arrays.java (java.util.Arrays$ArrayList.set)
 #2: LINE 53 in FILE SourceFile (net.minecraft.server.v1_13_R2.NonNullList.set)
 #3: LINE 108 in FILE CraftInventoryCustom.java (org.bukkit.craftbukkit.v1_13_R2.inventory.CraftInventoryCustom$MinecraftInventory.setItem)
 #4: LINE 98 in FILE CraftInventory.java (org.bukkit.craftbukkit.v1_13_R2.inventory.CraftInventory.setItem)
 #5: LINE 68 in FILE SpawnerGUI.java (gyurix.apeironspawner.SpawnerGUI.showPage)
 #6: LINE 54 in FILE SpawnerGUI.java (gyurix.apeironspawner.SpawnerGUI.<init>)
 #7: LINE 68 in FILE Commands.java (gyurix.apeironspawner.Commands.cmdShop)
 #8: LINE 305 in FILE CommandMatcher.java (gyurix.commands.plugin.CommandMatcher.executeNow)
 #9: LINE 274 in FILE CommandMatcher.java (gyurix.commands.plugin.CommandMatcher.lambda$execute$4)