No Schema/URL error in Google Structured Data Tool

I'm getting an error in Google's SDTT saying that it is unable to render the url. It's Wordpress w/ yoast and schema plug-ins, and this same set-up is working on other sites. The code snippet is showing when I inspect the page, but not when I try to test it.

At the same time, I'm losing a ton of featured snippets. I thought it had to do with whatever update Google is playing around with this weekend, but now I'm thinking it may have to do with this schema not functioning properly.

I can PM the site if anyone would care to take a look?

Thanks in advance.

Are your plugins latest version of not update them, clear your cache that should work and clear the error

Mr Positive said:

Are your plugins latest version of not update them, clear your cache that should work and clear the error

Click to expand...

I updated the schema plug-in, cleared cache, and still have the issue. I'll try the same with Yoast.

Problem is, I had this theme built on upwork by someone who outsourced all of the work, and whenever I update WP, it breaks the site. Does the same for some plug-ins, too.

I'm also told from the higher-ups that a budget for a new theme or fixing this one won't be available until beginning of year, so using all of the virtual rubber bands and tape that I can.