Different Kind of Export Error

This has my exported app, with assets, and the vl doc
callmenames-2021-07-23_02.vl (41.2 KB)

I can export this successfully, I can run it on my dev machine, but on a clean pc it throws image
MainApp Debug.log (47.7 KB)
Cast is not valid, what is this refering to, and how do I fix it?

seems to be the same as this one: Exported project runs only on one PC

we found a possible cause, please try with the latest preview and let us know whether it works on your machine.

Thats fixed it! (using preview 244)