Why is my Buy Button embed code from Shopify not loading on my WordPress site?

A Shopify Buy Button fails to render on WordPress when there are missing script integration tags in your page header, or when active security/cache plugins block external Shopify JS files.

“Most minor website breaks are caused by simple script conflicts, legacy code blocks, or broken API handshakes. We identify and clear these issues immediately as a straightforward, one-time fix.”
— Jeff Bollettino, Managing Director, Ignite Conversions