Cant add products to cart: "Product is not available in this quantity"

Hi,

I have been running my store successfully for two years. now all of a sudden the cart is not working anymore.
As soon as I add an item or even just open the empty cart I immediately get the error message “Product is not available in this quantity”.

It seems to be exactly the same behavior as with Kimberly_Rickle.
Unfortunately, the measures described there have not brought any improvement for me. I have already disabled web payments and removed ApplePay. Unfortunately without improvement.

Can someone please help me - thank you!

read only link:
https://preview.webflow.com/preview/esslinger-wein-shop?utm_medium=preview_link&utm_source=designer&utm_content=esslinger-wein-shop&preview=2314598177b07ce6852f56d2bc163b55&workflow=preview

Why not reach out to Webflow support and open a trouble ticket?