Running into the same issue since a recent bitdefender update.
Could you specify what file in what folder it is trying to create so I can whitelist it?
Same goes for the Cheath###.tmp file that the trainers try to create, it would help greatly if the ### was a fixed number every time so I can whitelist it.
I suggest you try it with a the usual scan exclusions in the AV module for the trainer exe file and the Work folder located here -> C:\Users\YourWindowsUserName\Cheathappens\ and completely disable the Advanced Threat Defense module as you cannot exclude folders or *.tmp files in there.
But you still might run into this error message.
For further support, please contact Bitdefender.
[Edited by moderator Taurusplopp, 12/28/2017 2:13:42 AM]