Problems with ecwid integration

Hello everyone

I hope someone can help me here. we have integrated a web shop from ecwid into our site. This shop was already working. Unfortunately, it hasn’t been working for about 1-2 years (we haven’t had time to take care of it until now).

the shop runs error-free on the webflow.io site. But on the published page all the custom code is gone! The shopping cart does not work and the article does not load either.

https://fast-club.webflow.io/shop/polo-shirt-fast-club-woman
https://www.fast-club.de/shop/polo-shirt-fast-club-woman

I’ve tried everything I can think of.

Thanks very much