itch.io

I'm surprised they didn't update meetsSkillConditions themselves. Would have been a godsend for compatibility.

I honestly don't know if anything simple I write would be compatible with that plugin due to that, but try adding this in a patch after their plugin:

var skillConditionPatch = skillConditionPatch || {};
skillConditionPatch.meetsSkillConditions = Game_BattlerBase.prototype.meetsSkillConditions;
Game_BattlerBase.prototype.meetsSkillConditions = function(skill) {
   if (this.isActor() && !this.eqsSkillEquipped(skill)) {
      return false;
   }
   return skillConditionPatch.meetsSkillConditions.call(this, skill);
};

And I make no promises; this is untested. If that doesn't work... well, all due respect? I'm not rewriting my plugin just to deal with a plugin that wasn't really made with general compatibility in mind that may have been abandoned over seven years ago.

EDIT: Another possibility would be to patch eqsSkillEquipped.