setpathfindingmalus mechanic is not working

Summary

setpathfindingmalus mechanic is not working, whether in mob config or skill config, even when moved to the main folder (outside of packs) it still shows the same error.

Steps to reproduce

Mythicmobs v5.10.0 & Paper-1.21.8-60

hbs_Mob1:
  Type: IRON_GOLEM
  Display: "Mob 1"
  Variables:
    faction: villager_companion # //customizable //default: villager_companion
  Modules:
    ImmunityTable: true
    ThreatTable: true
  Options:
    AlwaysShowName: false
    Despawn: FALSE
    Silent: true
    PreventOtherDrops: true
    PreventRandomEquipment: true
    PreventMobKillDrops: true
    PreventVanillaDamage: true
    KnockbackResistance: 0.25
    FollowRange: 32
  AIGoalSelectors:
    - clear
    - meleeAttack
    - randomStroll
    - lookAtTarget{s=0.9;r=16}
    - randomLookAround
    - lookAtPlayers{r=4}
    - goToSpawn{mr=16;r=64}
    - openDoor
    - float
  AITargetSelectors:
    - clear
    - attacker
    - monsters
  Skills:
    - skill{skill=[
        - gcd{ticks=60} @self
        - setfaction{faction=<caster.var.faction>} @self 
        - setpathfindingmalus{malus=DAMAGE_CAUTIOUS;value=1} @self 
        - setpathfindingmalus{malus=DAMAGE_OTHER;value=1} @self 
        - setpathfindingmalus{malus=DANGER_OTHER;value=1} @self 
      ]} @self ~onSpawnorload
    - skill{skill=[
        - model{m=test_model;usm=true;save=true;s=1;init=true} @self 
        - partvis{p=weapon;c=true;v=false} @self
        - partvis{p=death_weapon;c=true;v=false} @self
        - partvis{p=lantern;c=true;v=false} @self
        - brightness{p=lantern_light;b=15;s=15} @self
        - brightness{p=weapon_aura;b=15;s=15} @self
        - bodyclamp{mh=70;mb=70;s=1;rde=20;rdu=10} @self
        - defaultstate{li=3;t=IDLE;s=idle} @self
        - defaultstate{li=3;t=WALK;s=walk} @self
        - renderinit{delay=1} @self
      ]} @self ~onSpawn

Current behavior

setpathfindingmalus mechanic is considered as custom mechanic (null).

Server log file

https://pastebin.com/HWY7SA8U