My Players Cant place Spawners

Here is my Silkspawners config plus i think its somthing whit essentials cuz wen i disabled essentials it works but wen i enable it it dont work. and there is no error massage it just wont let them place it please help

Code:

# Should the plugin automatically update if an update is available?
autoUpdater: true

# Should a permission be required when a spawner explodes by TNT to achieve a drop
permissionExplode: false

# Should be checked for WorldGuard build ability to change spawners
useWorldGuard: false

# Percentage of dropping a spawner block when TNT or creepers explode
explosionDropChance: 30

# Percentage of dropping a iron bars when a spawner is mined
destroyDropChance: 100

# Percentage of dropping an egg when a spawner is mined
eggDropChance: 100

# Percentage of dropping the spawner when mined
silkDropChance: 100

# When generic spawner items are placed, spawn this creature (e.g. from /give or other plugins)
# PIG (90) is Minecraft default (put NAMES or IDs here!)
defaultCreature: 90

# How far is the spawner reachable with your crosshair (disable with -1)
spawnerCommandReachDistance: 6

# Minimum silk touch level [can be changed via other plugins to a higher value]
# Set it to 0 to mine it without silk touch
minSilkTouchLevel: 1

# If a player in creative destroys a spawner nothing is dropped
noDropsCreative: true

# If a spawner is destroyed, should the egg be dropped
destroyDropEgg: false

# If a spawner is destroyed, should XP be dropped
destroyDropXP: 0

# If a spawner is mined, should it be directly added to the inventory of the player
dropSpawnerToInventory: false

# Amount of spawners to be dropped when mined with valid silk touch
dropAmount: 1

# Flag a spawner as already mined to prevent XP duping
preventXPFarming: true

# Drops XP only when a spawner is destroyed and not mined via silk touch
dropXPOnlyOnDestroy: false

# If a spawner is destroyed, should iron bars be dropped
destroyDropBars: 0

# Should the player be able to craft spawners
craftableSpawners: false

# Leave a slot empty (null/air)? Just make a space then, example 'A A' -> middle is free
# X is always the egg
recipeTop: AAA
recipeMiddle: AXA
recipeBottom: AAA
recipeAmount: 1

# Custom example:
#recipeTop: 'A A'
#recipeMiddle: 'BXA'
#recipeBottom: 'C D'
#ingredients:
# - 'A,IRON_FENCE'
# - 'B,DIRT'
# - 'C,2'
# - 'D,5'

# You can put IDs or the NAME here (please uppercase)
# Add it for each custom ingredient you add, too!
ingredients:
- A,IRON_FENCE

# Should spawners be unstackable
spawnersUnstackable: false

# Should the egg be consumed when the spawner is changed with it
consumeEgg: true

# Fallback if the creature should be enabled, if not specified for the entity
enableCreatureDefault: true

# Should numbers be ignored (on eggs) and allow every number value?
ignoreCheckNumbers: false

# Disable left click to change spawners, spawns a mob instead. Still blocks Vanilla right click behavior.
disableChangeTypeWithEgg: false

# Should instead of spawning a mob a MonsterSpawner be placed? (Uses consumeEgg value, too)
spawnEggToSpawner: false

# Should the spawn algorithm be overridden? Allows spawning of non-standard entities
spawnEggOverride: false

# Fallback if the creature should be spawned, if not specified for the entity
spawnEggOverrideSpawnDefault: true

# Allowed set of tools which can mine a spawner. IDs are supported, too
allowedTools:
- WOOD_PICKAXE
- STONE_PICKAXE
- IRON_PICKAXE
- GOLD_PICKAXE
- DIAMOND_PICKAXE

# Amount of spawners or eggs given to a player when the argument is omitted
defaultAmountGive: 1

# Notify the player about the spawner when he clicks it in the inventory
notifyOnClick: true

# Notify the player about the spawner when he holds the spawner in the hand
notifyOnHold: true

# Configure displaying with BarAPI, time is in seconds
barAPI:
enable: false
displayTime: 3

# Configure displaying with 1.9 BossBarApi, time is in seconds
vanillaBossBar:
enable: true
displayTime: 3

# Valid colors are BLUE, GREEN, PINK, PURPLE, RED, WHITE, YELLOW
color: RED

# Valid styles are SEGMENTED_10, SEGMENTED_12, SEGMENTED_20, SEGMENTED_6, SOLID
style: SOLID

# Prevent that a spawner is changed via eggs in other territories
factionsSupport: false

# Prevent that a spawner is changed via eggs in other kingdoms
feudalSupport: false

# Puts more information out on startup
verboseConfig: false

# Internal stuff, do NOT change unless advised - the plugin might break otherwise
useReflection: true
testMCVersion: true
useMetadata: true

 

By disable/enable essentials you mean remove from the plugin folder/add it back?

Essentials has the AntiBuild portion of the plugin that whilelist/blacklist certain items from being placed/broken. Are spawners on that list in the essentials configuration?