Bukkit

whenever i try to spawn an infernal mob it says
"An internal error occurred while attempting to perform this command" any idea?

my config is

configVersion: "1.12
#Chance is the chance that a mob will not be infernal, the lower the number the higher the chance. (min 1)
#Enabledworlds are the worlds that infernal mobs can spawn in.
#Enabledmobs are the mobs that can become infernal.
#Loot is the items that are dropped when an infernal mob dies. (You can have up to 64)
#Item is the item, Amount is the amount, Durability is how damaged it will be (0 is undamaged).
#nameTagsLevel is the visibility level of the name tags, 0 = no tag,
#1 = tag shown when your looking at the mob, 2 = tag always shown.
#Note, if you have name tags set to 0, on server restart all infernal mobs will turn normal.
#If you want to enable the boss bar you must have BarAPI on your server.
#nameTagsName and bossBarsName have these special tags: <mobLevel> = the amount of powers the boss has.
#<abilities> = A list of about 3-5 (whatever can fit) names of abilities the boss has.
#<mobName> = Name of the mob, so if the mob is a creeper the mobName will be "Creeper".
chance: 100
#mobChances:
# Ghast: 150
#levelChance:
# '3': 1
# '4': 1
# '5': 1
# '6': 1
# '7': 1
namePrefix: '&fInfernal'
#levelPrefixs:
# '3': '&fMad'
# '4': '&fRabid'
# '5': '&fGiant'
# '6': '&fKing'
# '7': '&fInfernal'
nameTagsLevel: 1
nameTagsName: '&f<prefix> <mobName>'
bossBarsName: '&fLevel <mobLevel> &f<prefix> <mobName>'
enableBossBar: true
bossBarSettings:
defaultColor: "PINK"
defaultStyle: "SOLID"
# perMob:
# PigZombie:
# color: "RED"
# style: "SEGMENTED_6"
# Ghast:
# color: "RED"
# style: "SEGMENTED_12"
# WitherSkeleton:
# color: "RED"
# style: "SEGMENTED_20"
# Blaze:
# color: "RED"
# style: "SEGMENTED_10"
# Creeper:
# color: "GREEN"
# style: "SEGMENTED_6"
# perLevel:
# 5:
# color: "GREEN"
# style: "SEGMENTED_6"
enableScoreBoard: false
showHealthOnScoreBoard: true
effectAllPlayerAttacks: true
enableParticles: true
enableDeathMessages: false
deathMessages:
- '&cplayer &chas killed an mob&c!'
- '&cAn mob &cwas slain by player&c!'
- '&cplayer &cowned an mob&c!'
- '&cAn mob &cwas beheaded by player&c''s weapon!'
- '&cplayer&c''s weapon &ckilled an mob&c!'
- '&cAn mob &cwas killed by player &cusing a weapon&c!'
enableSpawnMessages: false
spawnMessageRadius: 64
spawnMessages:
- '&cAn Infernal mob has spawned near you!'
- '&cWatch out!'
- '&cYou hear a faint scream...'
- '&cSomething is coming...'
- '&cYou hear a mob nearby...'
mobworlds:
- <all>
effectworlds:
- <all>
enabledmobs:
- ELDER_GUARDIAN
- WITHER_SKELETON
- STRAY
- HUSK
- ZOMBIE_VILLAGER
- SKELETON_HORSE
- ZOMBIE_HORSE
#- DONKEY
#- MULE
- EVOKER
- VEX
- VINDICATOR
- CREEPER
- SKELETON
- SPIDER
- GIANT
- ZOMBIE
- SLIME
- GHAST
- PIG_ZOMBIE
- ENDERMAN
- CAVE_SPIDER
- SILVERFISH
- BLAZE
- MAGMA_CUBE
- ENDER_DRAGON
- WITHER
- BAT
- WITCH
- ENDERMITE
- GUARDIAN
- SHULKER
- ILLUSIONER
- PARROT
#- PIG
#- SHEEP
#- COW
#- CHICKEN
#- SQUID
#- WOLF
#- MUSHROOM_COW
#- SNOWMAN
#- OCELOT
#- IRON_GOLEM
#- HORSE
#- RABBIT
- POLAR_BEAR
- LLAMA
#- VILLAGER
enabledCharmSlots:
- 0
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 36
poisonous: true
armoured: true
blinding: true
withering: true
tosser: true
thief: true
quicksand: true
bullwark: true
rust: true
sapper: true
1up: true
cloaked: true
ender: true
ghastly: true
lifesteal: true
sprint: true
storm: true
webber: true
vengeance: true
weakness: true
berserk: true
explode: true
potions: true
mama: true
molten: true
archer: true
necromancer: true
firework: true
gravity: true
flying: true
mounted: true
morph: true
ghost: true
confusing: true
mamaSpawnAmount: 3
vengeanceDamage: 6
berserkDamage: 3
moltenBurnLength: 5
gravityLevitateLength: 6
horseMountsHaveSaddles: true
armouredMountsHaveArmour: true
fireworkColour:
red: 255
green: 10
blue: 10
enabledSpawnReasons:
- BREEDING
#- BUILD_IRONGOLEM
#- BUILD_SNOWMAN
- BUILD_WITHER
- CHUNK_GEN
#- CURED
- CUSTOM
- DEFAULT
#- DISPENSE_EGG
#- EGG
- INFECTION
- SPAWNER_EGG
#- JOCKEY
- LIGHTNING
#- MOUNT
- NATURAL
- NETHER_PORTAL
- OCELOT_BABY
- REINFORCEMENTS
- SILVERFISH_BLOCK
- SLIME_SPLIT
#- SPAWNER
#- SPAWNER_EGG
#- TRAP
#- VILLAGE_DEFENSE
- VILLAGE_INVASION
mobParticles:
- lavaSpark:1:10
mountFate: nothing
enabledMounts:
- SPIDER
- SKELETON_HORSE
- ZOMBIE_HORSE
- DONKEY
- MULE
- SLIME
- GHAST
- MAGMA_CUBE
- ENDER_DRAGON
- BAT
- PIG
- SHEEP
- COW
- CHICKEN
- MUSHROOM_COW
- HORSE
- POLAR_BEAR
- LLAMA
enabledRiders:
- WITHER_SKELETON
- STRAY
- HUSK
- ZOMBIE_VILLAGER
- EVOKER
- VINDICATOR
- SKELETON
- ZOMBIE
- PIG_ZOMBIE
- ENDERMAN
- WITCH
- SNOWMAN
- VILLAGER
- ILLUSIONER
disabledBabyMobs:
- WOLF
- MUSHROOM_COW
- COW
- SHEEP
- PIG
- CHICKEN
- OCELOT
- HORSE
#The min/max amount of powers that a mob will get.
#NOTE: the amount of enabled powers must not be less than the maxpowers.
#healthMultiplier is what number the infernal mobs health will be multiplied by.
#If you have healthByPower enabled then healthMultiplier and healthByDistance will do nothing.
#dropChance is the chance a dead mob will drop loot, the lower the higher the chance (min 1)
#xpMultiplier is what the normal xp a mob drops will be multiplied by.
#healthByDistance makes mobs HP go up as you go further from the world spawn.
#Every addDistance blocks the mobs will get healthToAdd times how far they are HP.
minpowers: 3
maxpowers: 7
healthMultiplier: 4
healthByPower: false
healthByDistance: false
powerByDistance: false
healthToAdd: 5
powerToAdd: 1
xpMultiplier: 8
addDistance: 200
enableDrops: true
dropChance: 1
enableFarmingDrops: false
naturalSpawnHeight: 0