Cache / there is empty

Hi, thanks for your attention
We are using your plugin on several websites, but this one does not generate the static html files.
For example, in another website that we use your plugin (icert.es) if we make it have an error with the connection to the database, it continues to show us the page, on the other hand, in ofitronic.net it shows the failure error in the database connection …

The page I need help with: [log in to see the link]