Script Editor - Add Content on Thank You Page Based on a Particular Product

[CorporateKeith]

I am looking to create a specific content box for a product on our site once that user gets to the Thank You Page. For this product, I am looking to add text and a hyperlink for users to click once they have completed checkout. (this is for purchasing a webinar). I found the Shopify Help Manual with the following script (https://help.shopify.com/en/manual/orders/status-tracking/show-content-based-on-products), however, when I added this script, a new error at checkout was generated. (below) Does anyone have the correct script for this request or know of an alternative solution?

Error Message: