Feel like I'm close… still an issue

I’m using a theme with a built in custom post type that looks like this:

https://site.com/?service=air-freight

The plugin will set the post type structure to https://site.com/air-freight but the link returns a 404. Like I said, I feel like the answer is close, just can’t quite figure it out. Can someone tell me what I’m doing wrong?

Thanks.

https://www.ads-software.com/plugins/custom-post-type-permalinks/