How To See What URLs Fail To Cache
Here is a short guide on how you can see the status of your URLs in Prerender.
Click "Render History" on the left-hand side.
Click the filter icon next to "HTTP Status."
Select or choose a range to view your preferred error codes, such as between 300 and 599.
From there, you can view the URLs that return the selected error codes, such as these 504 errors below.