Unable to format query to return results

When I try to add a Plugin for the site “https://www.thelinernotesproject.com” I use the following as per the examples in the help file. “The Liner Notes ProjectagentQuery” but I receive absolutely no hits when I test it.

The URL never changes or offers a more specific URL that I can customize or pull apart. Any suggestions on how to make this work?

That site requires JavaScript to function.
Also, Google doesn’t even seem able to search this site.

So I assume then that it would tyake some work to get a plugin to access the search functionality this site uses?

Given what I just tested, I can’t say it’s even possible.