Error 500 message across all sites

Permalink
Getting the following error with both of my websites. Any thoughts on why this is happening?

This page isn’t working
*website* is currently unable to handle this request.
HTTP ERROR 500

View Replies:
ConcreteOwl replied on at Permalink Reply
ConcreteOwl
Possibly the server php version has been upgraded to one that is not compatible with your version of concrete5.