Errors when adding custom Archetype

[Repairman_Jack]

I am trying to add the Warhound archetype for the Slayer Class. To start with, I am creating a custom archetype that doesn't alter anything. I am able to create this new archetype, and am able to get it to show up in HL. But, when I select it, I get the following error messages...

Tag 'SpecSource.arANTSlaWH' not defined
Location: 'eval' script for Component 'BaseVary' (EvalScript '#12') near line 7

Identity tag does not exist for thing/pick 'arANTSlaWH'
Location 'eval' script for Component 'BaseVary' (Eval Script 'Most Archetype Changes') near line 4

I have no idea what these errors are referring to, and no idea how to fix this. Please help.