@paul2009 Thank you so much!! Your advice directed me in the right direction for honing in on this issue. Lo and behold, I've adjusted the configuration in the code for the Cookie Control feature so that the CART and hasCart cookies are protected and the cart works now!
@creedon Thanks for responding. Apologies. My site is live and the address is www.football-infographics.com. The issue is resolved thanks to Paul's guidance.