Debugging deploy fails

I need advice to debug deploy Netlify App

It built no problem, and all of a sudden new builds are failing and I don’t understand why. Nothing has changed in my codebase.

I’m seeing this error message: Error occurred prerendering page
Not sure how to resolve this, nothing has changed since the last successful build.

Line 97 of your build log Netlify App, says this:

6:19:08 AM: Unhandled error during request: FetchError: invalid json response body at reason: Unexpected token I in JSON at position 0

Which likely means something has gone wrong while getting a JSON response from something that looks like an API. I think fixing that would be first step to narrow down the problem.