I have done the following:
Renamed the exe file
Ran as administrator
Played in Offline Mode
Is there anything special that people are doing to run this? For reference, I'm playing on the steam version.
Edit:
I found the solution, never mind.
For those who are still trying to find the solution it is to rename the file name. The one that is originally called BO3 Zombies trainer mpgh.net (or something similar to that).