Steps to reproduce:
1) Go to https://box.fileee.com/
2) Click on buy
3) Put one of the items into the cart
4) Sidecart should open.
5) Now neither clicking on "calculate" or entering a ZIP Code should do anything. That is the problem we are facing.
I don't see any problems in the console. I testet it on firefox, chrome and internet explorer. Everywhere the same problem.
I also looked into the latest github template code of foxycart, to see if something has changed. No it hasn't. Also on https://www.foxycart.com/features/examples
everything works as expected.
I also deactivated our custom script configration under the admin panel, although i highly doubt that this interferes. No luck.
This whole forum post is kind of a last resort for me to ask for help or more tips what i could look into, in order to find the problem.