Conditions spaners

hello
i am create spaner and ad Conditions "onblick GRASS"
mobs not spawn
my spawners config:

TEST:
MobName: TEST
World: world
X: 9744
Y: 69
Z: 3848
Radius: 7
UseTimer: true
MaxMobs: 4
MobLevel: 1
MobsPerSpawn: 1
Cooldown: 0
CooldownTimer: 0
Warmup: 0
WarmupTimer: 0
CheckForPlayers: true
ActivationRange: 40
LeashRange: 32
HealOnLeash: false
ResetThreatOnLeash: false
ShowFlames: false
Breakable: false
Conditions:
- onblock GRASS
ActiveMobs: 0...

Conditions spaners