Affirm pay‑over‑time messaging

I'm not a coder, so that been said, is a complicated setup that I have to spend 5 hours just to figure it out and nothing. The instructions are not clear and not much explaining. Videos can be helpful for does not code-savvy. Super frustrated because I'm approved but can't use the app.

UPDATE

Customer support fixed the problem for that I'm happy, but they needed to enter the code manually seen the app is not compatible with all the themes that Shopify offers and the one I'm using free Supply theme is not compatible. I hope they can make it simple to implement affirm to any theme.