I am getting that error for about 3 days and I am not getting any sales. The customers can not order any thing. When the click on cart on any product, this error appears. I am so much confused,i check my theme customizations but I am unable to resolve it. I also delete woocommerce and add it but I am unavailable to resolve this issue. Please help me to solve this issue
My website : https://www.livepurefilters.net
Kindly help me.

I want any programmer or woocommerce manager who can solve my issue. I am so much confused.