Add to cart" button stopped working

Hi, the "Add to cart" button stopped working. After clicking the button, it does not redirect to checkout page :(

It's the same on all products, link to example card: https://opop.pl/index.php/zamow/redcat

The button is named "DALEJ" at the bottom.

Probably the problem apear after the update. Although there were several modifications on this page (I needed tchem), in example:
- Cart plugin was published only on Checkout Page and turned off for all devices - I turned it on but it didn't help;
- On of the option in Joomla simple addresses was trned of - because filters on product list didn;t work - I'v turn it on but did not help;

You can check modyfications in a history of my posts.
If you need access I'v turned on your account that you use to login in.

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