Shopify Theme Code Help

Hello! I have a Shopify website and I need someone with expertise on how the Shopify theme code works to help me remove a link embedded somewhere in the code that was used to track leads / customer sign ups, but is now causing an error message on my site. I look forward to connecting with you and working together! [I've attached a screenshot of the error message I get when I try to sign up on my Shopify site. This error is because of a lead tracker link I need to remove from the code]