[23:40:59 ERROR]: Error occurred while enabling MythicDrops v6.0.0-rc.3 (Is it up to date?)
java.lang.IllegalArgumentException: Parameter specified as non-null is null: method com.tealcube.minecraft.bukkit.mythicdrops.repair.MythicRepairCost.<init>, parameter material
        at com.tealcube.minecraft.bukkit.mythicdrops.repair.MythicRepairCost.<init>(MythicRepairCost.kt) ~[?:?]
        at com.tealcube.minecraft.bukkit.mythicdrops.MythicDropsPlugin.reloadRepairCosts(MythicDropsPlugin.java:775) ~[?:?]
        at com.tealcube.minecraft.bukkit.mythicdrops.MythicDropsPlugin.onEnable(MythicDropsPlugin.java:946) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:264) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-d7bebef]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:337) [spigot-1.12.2.jar:git-Spigot-dcd1643-d7bebef]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:403) [spigot-1.12.2.jar:git-Spigot-dcd1643-d7bebef]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.enablePlugin(CraftServer.java:381) [spigot-1.12.2.jar:git-Spigot-dcd1643-d7bebef]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.enablePlugins(CraftServer.java:330) [spigot-1.12.2.jar:git-Spigot-dcd1643-d7bebef]
        at net.minecraft.server.v1_12_R1.DedicatedServer.init(DedicatedServer.java:206) [spigot-1.12.2.jar:git-Spigot-dcd1643-d7bebef]
        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:545) [spigot-1.12.2.jar:git-Spigot-dcd1643-d7bebef]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_151]