Help : Unity IAP screen getting my game rejected in Apple Store

Hey my app has been rejected half a dozen times due to this screen.
Ive reached out to Apple and Unity but havent gotten a response yet.
Been sifting htrough the code of the In app purchasing package for far too long.

All i need to figure out is where does this line of text come from?
“Native Android/iOs purchase window should be displayed.”

Any form of help would be amazing!