SSE Dummy esp prevent game loading?!

[theFuzzyWarble]

I'm trying to load some mesh/texture overrides via a bsa/dummy esp.

 

Anyone have a clue what would cause a dummy esp to stop the game from loading?

 

I've tried creating one from scratch in the CK.

As well, I copied one from another mod and renamed it, placed it my mods folder.

 

Double checked both versions in xEdit and it looks fine.

 

With the esp disabled, the game loads fine.

Ff enabled, the game fails to load.

 

I'm puzzled. Halpz