Can not start Plesk 12.5 - sw_engine failed

This happened completely out of the blue. No changes were made to the system. The funny thing is that I loaded up a backup image from last week and I am having the same issue on that image as well. The panel has been working fine since last night. This is very strange. Anyway here are the logs:

Starting sw_engine service… failed


Logs:

sw-cp-server/sw-engine.log

[23-Jan-2016 03:47:42] ERROR: FPM initialization failed

[23-Jan-2016...

Can not start Plesk 12.5 - sw_engine failed