What do you do when you have fifteen “404” errors reported by WebPagetest.org. This is bad news and causes erratic delays in page loading.
Sometimes a potential, simple 404 fix might be reinstalling your theme – or else isolating the missing files from the theme package and uploading them individually to the right server folders via Cpanel or FTP.
We’ve also seen site owners place “dummy” assets (empty files) for the theme to call. This reduces the errors. We’ve done this trick, too, even though it is not a good practice. It sort of fixes the problem.
Do you have missing assets causing 404 errors and speed delays?