Crash from sleep in Yosemitie

Since I have upgraded my MacMini to Yosemite, my Mac Mini crashes when it wakes from sleep.

I have it set to sleep from 1 AM until 8 AM.

When I get home from work, it is at the login screen, and when I log in, it says that the system crashed, did I want to send the info to Apple.

Looking at the log, I can see it crashed from sleeping mode.

Ideas? Fixes?

Thanks