Printful integration: "Dang it. Ecommerce is not yet initialized"

I am trying to connect my Printful account to my Webflow site, when I authorize it, it says “Dang it. E-commerce is not yet initialized”
I reached out to Printful and they said I have to contact Webflow support, but they are not replying.
Anybody that had the same issue and how did you solve it?