@StellaRose looks like there is another configuration that is overriding the one you are explicitly adding to the liquid file. The configuration that takes precedence is having the path set to "#ProductPrice". Have you tried to configure the widget through other/different means before reaching out?
@thughes2020 I cannot help you with the widget installation, so you might want to reach out to Shopify Experts if you need help with the development/integration part. But I can help you identifying the correct path, there you go: