Same problem for me as the post above.
My host did the force upgrade of Litespeed yesterday, which fixed the problem of HTML markup being displayed in the browser. Today, however, I either get nothing rendered at all, or the page is treated as an unknown file type by the browser and downloaded as a file.
Google Page Insights reports: "The URL was fetched, but nothing was rendered. Ensure that the URL points to an HTML page that loads successfully in a web browser."
This only occurs when the Page caching method is disk: enhanced. disc: basic works.
