Made a clone of my EJ account for new owner - it can't open cart

[harry]

I've sold my business and have been working with the new owner to get everything set-up. He's cloned my website and setup an e-junkie account that's practically identical to mine in all the product, option, shipping details, thank-you templates, etc.

We modified his website code to use his new EJ client id, and his product numbers. But all the other code (Angular) is strictly identical. We're each using static hosting at Amazon S3.

When I 'add to cart' on the production website, the cart loads fine (whether I hit it with the DNS name or the uglier Amazon name). When he goes through the same steps to add a product to the cart, it hangs. We've double checked everything we can think of. We're both using box_fb_o.js

Here's our only good clue: My add-to-cart string in devtools network tab, https://www.e-junkie.com/ecom/gb.php?... sends
cart_id=<8-digit-number>; his is "null"
to_country=US; his is "null" (we checked this everywhere we could in his acct setup)
cart_currency=USD; his is "null"
cart_md5=; his is "null"

All his params for cl, on1, os1 and so on are the values we expect. They're generated by my own code. But the ones that EJ is somehow adding are showing up different.

Can you help?

Thanks,

Harry

[E-junkie_Guru]

The problem may be that box_fb_o.js, as that forces loading of our classic cart-overlay script. New accounts have our new cart enabled by default, so try changing that to box_fb_n.js for the new owner's site.