Something about that content causes our prerender service to time out. I wish we had better logging here to show you, but essentially those requests time out after waiting 24s for a response from our prerender service. Do you by chance set window.prerenderReady to false on your page? If you do, you are never updating it to true which will cause a timeout. If not, it’s something else about your JS code.
You can follow our advice around running locally from the repo to try to debug locally: