@Nofish, @Uk4dee - what are the expected results once you have executed the "Purchase Product IAP" action?
For me in iOS, it pops up with the following things:
1. "Confirm your In app purchase" (It references the correct iap I set up in itunes connect
2.I hit Buy, and then it comes up with: "Verification Required"
3. I hit continue, and it prompts me to enter my Apple ID Password, which I do
4. Then it take me to itunes, and pops up with "[environment sandbox]"
5. I hit continue, and it prompts me to enter my Apple ID password again
6. repeats the entire cycle again
If I cancel at any point, the whole process fails.
I think I'm getting close, but I'm still missing something.