For no apparent reason, my cart index page, or all pages for that matter, now just load a blank page. I can put a generic test PHP page in the directory and it works fine, but any of the Viart pages just load a blank page. This app has been running trouble free for 3 weeks and is now down on a production server that hasn't been touched since initial installation. Any ideas?

Hi, you may check whether Zend encoded files are uploaded correctly using binary mode.
Also the possible reason is exceeding of memory limit for PHP.

This exact same problem has occurred with my site.
The site loads a blank page & the admin is loading blank as well.
I have made no changes to the site & it was working ok for past few weeks.
 
Did you find a resolution to this issue?
How can I check for "exceeding memory limit for PHP"