07/14/2014 at 6:49 pm #296987
Have you updated WordPress, theme or any other plugins? If you did that might have cause some sort of conflict. As a guess, it appears the memory allocated to PHP is being exhausted. Here’s an excellent post that lists several methods to increase the memory allocation. Which method that works will depend entirely on the web host. I suggest starting at the top and working your way down.
I hope that helps, let me know!