[18:45:42] [Server thread/ERROR]: [mcMMO] There was an error while enabling mcMMO!
[18:45:42] [Server thread/WARN]: java.lang.IllegalArgumentException: Recipe must have non-AIR result.
[18:45:42] [Server thread/WARN]:        at com.google.common.base.Preconditions.checkArgument(Preconditions.java:143)
[18:45:42] [Server thread/WARN]:        at org.bukkit.inventory.CraftingRecipe.<init>(CraftingRecipe.java:21)
[18:45:42] [Server thread/WARN]:        at org.bukkit.craftbukkit.v1_21_R1.inventory.CraftComplexRecipe.<init>(CraftComplexRecipe.java:17)
[18:45:42] [Server thread/WARN]:        at net.minecraft.world.item.crafting.IRecipeComplex.toBukkitRecipe(IRecipeComplex.java:43)
[18:45:42] [Server thread/WARN]:        at net.minecraft.world.item.crafting.RecipeHolder.toBukkitRecipe(RecipeHolder.java:16)
[18:45:42] [Server thread/WARN]:        at org.bukkit.craftbukkit.v1_21_R1.inventory.RecipeIterator.next(RecipeIterator.java:24)
[18:45:42] [Server thread/WARN]:        at org.bukkit.craftbukkit.v1_21_R1.inventory.RecipeIterator.next(RecipeIterator.java:10)
[18:45:42] [Server thread/WARN]:        at com.gmail.nossr50.util.skills.SkillUtils.getRepairAndSalvageQuantities(SkillUtils.java:315)
[18:45:42] [Server thread/WARN]:        at com.gmail.nossr50.config.skills.salvage.SalvageConfig.loadKeys(SalvageConfig.java:146)
[18:45:42] [Server thread/WARN]:        at com.gmail.nossr50.config.skills.salvage.SalvageConfig.<init>(SalvageConfig.java:28)
[18:45:42] [Server thread/WARN]:        at com.gmail.nossr50.config.skills.salvage.SalvageConfigManager.<init>(SalvageConfigManager.java:20)
[18:45:42] [Server thread/WARN]:        at com.gmail.nossr50.mcMMO.loadConfigFiles(mcMMO.java:605)
[18:45:42] [Server thread/WARN]:        at com.gmail.nossr50.mcMMO.onEnable(mcMMO.java:200)
[18:45:42] [Server thread/WARN]:        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:267)
[18:45:42] [Server thread/WARN]:        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:342)
[18:45:42] [Server thread/WARN]:        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:492)
[18:45:42] [Server thread/WARN]:        at org.bukkit.craftbukkit.v1_21_R1.CraftServer.enablePlugin(CraftServer.java:575)
[18:45:42] [Server thread/WARN]:        at org.bukkit.craftbukkit.v1_21_R1.CraftServer.enablePlugins(CraftServer.java:489)
[18:45:42] [Server thread/WARN]:        at net.minecraft.server.MinecraftServer.loadWorld0(MinecraftServer.java:641)
[18:45:42] [Server thread/WARN]:        at net.minecraft.server.MinecraftServer.loadLevel(MinecraftServer.java:426)
[18:45:42] [Server thread/WARN]:        at net.minecraft.server.dedicated.DedicatedServer.e(DedicatedServer.java:269)
[18:45:42] [Server thread/WARN]:        at net.minecraft.server.MinecraftServer.y(MinecraftServer.java:1017)
[18:45:42] [Server thread/WARN]:        at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:318)
[18:45:42] [Server thread/WARN]:        at java.base/java.lang.Thread.run(Thread.java:1583)
[18:45:42] [Server thread/INFO]: [mcMMO] Disabling mcMMO v2.2.018
[18:45:42] [Server thread/INFO]: [mcMMO] Server shutdown has been executed, saving and cleaning up data...
[18:45:42] [Server thread/WARN]: java.lang.NullPointerException: Cannot invoke "com.gmail.nossr50.party.PartyManager.saveParties()" because the return value of "com.gmail.nossr50.mcMMO.getPartyManager()" is null
[18:45:42] [Server thread/WARN]:        at com.gmail.nossr50.mcMMO.onDisable(mcMMO.java:372)
[18:45:42] [Server thread/WARN]:        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:269)
[18:45:42] [Server thread/WARN]:        at org.bukkit.plugin.java.JavaPluginLoader.disablePlugin(JavaPluginLoader.java:367)
[18:45:42] [Server thread/WARN]:        at org.bukkit.plugin.SimplePluginManager.disablePlugin(SimplePluginManager.java:513)
[18:45:42] [Server thread/WARN]:        at com.gmail.nossr50.mcMMO.onEnable(mcMMO.java:299)
[18:45:42] [Server thread/WARN]:        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:267)
[18:45:42] [Server thread/WARN]:        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:342)
[18:45:42] [Server thread/WARN]:        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:492)
[18:45:42] [Server thread/WARN]:        at org.bukkit.craftbukkit.v1_21_R1.CraftServer.enablePlugin(CraftServer.java:575)
[18:45:42] [Server thread/WARN]:        at org.bukkit.craftbukkit.v1_21_R1.CraftServer.enablePlugins(CraftServer.java:489)
[18:45:42] [Server thread/WARN]:        at net.minecraft.server.MinecraftServer.loadWorld0(MinecraftServer.java:641)
[18:45:42] [Server thread/WARN]:        at net.minecraft.server.MinecraftServer.loadLevel(MinecraftServer.java:426)
[18:45:42] [Server thread/WARN]:        at net.minecraft.server.dedicated.DedicatedServer.e(DedicatedServer.java:269)
[18:45:42] [Server thread/WARN]:        at net.minecraft.server.MinecraftServer.y(MinecraftServer.java:1017)
[18:45:42] [Server thread/WARN]:        at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:318)
[18:45:42] [Server thread/WARN]:        at java.base/java.lang.Thread.run(Thread.java:1583)
[18:45:42] [Server thread/ERROR]: Error occurred while disabling mcMMO v2.2.018 (Is it up to date?)
java.lang.NullPointerException: Cannot invoke "com.gmail.nossr50.database.DatabaseManager.onDisable()" because "com.gmail.nossr50.mcMMO.databaseManager" is null
        at com.gmail.nossr50.mcMMO.onDisable(mcMMO.java:402) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:269) ~[spigot-api-1.21-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.plugin.java.JavaPluginLoader.disablePlugin(JavaPluginLoader.java:367) ~[spigot-api-1.21-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.plugin.SimplePluginManager.disablePlugin(SimplePluginManager.java:513) ~[spigot-api-1.21-R0.1-SNAPSHOT.jar:?]
        at com.gmail.nossr50.mcMMO.onEnable(mcMMO.java:299) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:267) ~[spigot-api-1.21-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:342) ~[spigot-api-1.21-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:492) ~[spigot-api-1.21-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.craftbukkit.v1_21_R1.CraftServer.enablePlugin(CraftServer.java:575) ~[spigot-1.21-R0.1-SNAPSHOT.jar:4285-Spigot-fb8fb72-00fc9fb]
        at org.bukkit.craftbukkit.v1_21_R1.CraftServer.enablePlugins(CraftServer.java:489) ~[spigot-1.21-R0.1-SNAPSHOT.jar:4285-Spigot-fb8fb72-00fc9fb]
        at net.minecraft.server.MinecraftServer.loadWorld0(MinecraftServer.java:641) ~[spigot-1.21-R0.1-SNAPSHOT.jar:4285-Spigot-fb8fb72-00fc9fb]
        at net.minecraft.server.MinecraftServer.loadLevel(MinecraftServer.java:426) ~[spigot-1.21-R0.1-SNAPSHOT.jar:4285-Spigot-fb8fb72-00fc9fb]
        at net.minecraft.server.dedicated.DedicatedServer.e(DedicatedServer.java:269) ~[spigot-1.21-R0.1-SNAPSHOT.jar:4285-Spigot-fb8fb72-00fc9fb]
        at net.minecraft.server.MinecraftServer.y(MinecraftServer.java:1017) ~[spigot-1.21-R0.1-SNAPSHOT.jar:4285-Spigot-fb8fb72-00fc9fb]
        at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:318) ~[spigot-1.21-R0.1-SNAPSHOT.jar:4285-Spigot-fb8fb72-00fc9fb]
        at java.base/java.lang.Thread.run(Thread.java:1583) [?:?]