Spawn mob server

Hello,
On my Boxtoplay server the mobs do not spawn my friend tells me that it is because we had installed multiverse then delete do you have any idea ?
here server.proprieties:

spawn-protection=1
max-tick-time=60000
query.port=27586
generator-settings=
sync-chunk-writes=true
force-gamemode=false
allow-nether=true
enforce-whitelist=false
gamemode=survival
broadcast-console-to-ops=true
enable-query=true
player-idle-timeout=5
text-filtering-config=
difficulty=hard
spawn-monsters=true
broadcast-rcon-to-ops=true
admin-slot=false
op-permission-level=4
pvp=true
grow-trees=true
entity-broadcast-range-percentage=100
snooper-enabled=true
level-type=default
hardcore=false
enable-status=true
enable-command-block=true
max-players=50
network-compression-threshold=256
resource-pack-sha1=
max-world-size=29999984
function-permission-level=2
rcon.port=27585
server-port=27584
debug=false
server-ip=
spawn-npcs=true
allow-flight=false
level-name=world
view-distance=10
resource-pack=
spawn-animals=true
white-list=false
rcon.password=,
generate-structures=true
online-mode=true
max-build-height=256
level-seed=
prevent-proxy-connections=false
use-native-transport=true
enable-jmx-monitoring=false
motd=Hello
enable-rcon=true
rate-limit=0
Here spigot.yml:

config-version: 12
settings:
debug: false
bungeecord: false
sample-count: 12
player-shuffle: 0
user-cache-size: 1000
save-user-cache-on-stop-only: false
moved-wrongly-threshold: 0.0625
moved-too-quickly-multiplier: 10.0
log-villager-deaths: true
timeout-time: 60
restart-on-crash: true
restart-script: ./start.sh
netty-threads: 4
attribute:
maxHealth:
max: 2048.0
movementSpeed:
max: 2048.0
attackDamage:
max: 2048.0
messages:
whitelist: Tu n’es pas witelist
unknown-command: Commande non reconnue utilise /help
server-full: The server is full!
outdated-client: Le serveur tourne en {0}
outdated-server: Le serveur tourne en {0}
restart: le serveur redémarre
stats:
disable-saving: false
forced-stats: {}
commands:
log: true
tab-complete: 0
send-namespaced: true
spam-exclusions:

  • /skill
    silent-commandblock-console: false
    replace-commands:
  • setblock
  • summon
  • testforblock
  • tellraw
    advancements:
    disable-saving: false
    disabled:
  • minecraft:story/disabled
    players:
    disable-saving: false
    world-settings:
    default:
    verbose: true
    mob-spawn-range: 6
    hopper-amount: 1
    dragon-death-sound-radius: 0
    seed-village: 10387312
    seed-desert: 14357617
    seed-igloo: 14357618
    seed-jungle: 14357619
    seed-swamp: 14357620
    seed-monument: 10387313
    seed-shipwreck: 165745295
    seed-ocean: 14357621
    seed-outpost: 165745296
    seed-endcity: 10387313
    seed-slime: 987234911
    seed-bastion: 30084232
    seed-fortress: 30084232
    seed-mansion: 10387319
    seed-fossil: 14357921
    seed-portal: 34222645
    max-tnt-per-tick: 100
    enable-zombie-pigmen-portal-spawns: true
    item-despawn-rate: 6000
    view-distance: default
    wither-spawn-sound-radius: 0
    hanging-tick-frequency: 100
    arrow-despawn-rate: 1200
    trident-despawn-rate: 1200
    zombie-aggressive-towards-villager: true
    nerf-spawner-mobs: false
    end-portal-sound-radius: 0
    merge-radius:
    exp: 3.0
    item: 2.5
    growth:
    cactus-modifier: 100
    cane-modifier: 100
    melon-modifier: 100
    mushroom-modifier: 100
    pumpkin-modifier: 100
    sapling-modifier: 100
    beetroot-modifier: 100
    carrot-modifier: 100
    potato-modifier: 100
    wheat-modifier: 100
    netherwart-modifier: 100
    vine-modifier: 100
    cocoa-modifier: 100
    bamboo-modifier: 100
    sweetberry-modifier: 100
    kelp-modifier: 100
    entity-activation-range:
    animals: 32
    monsters: 32
    raiders: 48
    misc: 16
    tick-inactive-villagers: true
    ticks-per:
    hopper-transfer: 8
    hopper-check: 1
    hunger:
    jump-walk-exhaustion: 0.05
    jump-sprint-exhaustion: 0.2
    combat-exhaustion: 0.1
    regen-exhaustion: 6.0
    swim-multiplier: 0.01
    sprint-multiplier: 0.1
    other-multiplier: 0.0
    max-tick-time:
    tile: 50
    entity: 50
    squid-spawn-range:
    min: 45.0
    entity-tracking-range:
    players: 48
    animals: 48
    monsters: 48
    misc: 32
    other: 64
    worldeditregentempworld:
    verbose: false
    here bukkit.yml:

settings:
allow-end: true
warn-on-overload: true
permissions-file: permissions.yml
update-folder: update
plugin-profiling: false
connection-throttle: 4000
query-plugins: true
deprecated-verbose: default
shutdown-message: Le serveur est fermer
minimum-api: none
spawn-limits:
monsters: 70
animals: 10
water-animals: 15
water-ambient: 20
ambient: 15
chunk-gc:
period-in-ticks: 600
ticks-per:
animal-spawns: 400
monster-spawns: 600
water-spawns: 1
water-ambient-spawns: 1
ambient-spawns: 1
autosave: 6000
aliases: now-in-commands.yml
thanks