No those look like files that loaded successfully (200 status code). One of them might be the source script that fired off the ajax request but that won’t tell you about what’s coming back.
If you go to the Network tab and refresh the page you should see a bunch of records show up, mostly with 200 as the status code. But you may see one or two which have a different status code such as 500 which would be highlighted in red. If you click those records and then click Preview or Response, you might find a server-side error message there.
If you have php error logging set up you can of course check your log for server side errors too.