Hello there.
Thank you for taking the time to report this. 
BitDefender is known to be extremely aggressively trigger-happy, often excessively so. I have in the recent past also seen reports of BitDefender even blocking crucial Windows files that the Windows 10 operating system actually relies on to run smoothly.
Personally, I would recommend seeking a different antivirus service, due to BitDefender’s reputation as a bit of a drunk cowboy, but this is entirely up to you. If you would still like to continue to use BitDefender, please check out this gude by @Instinct and follow the instructions there: How to white-list WeMod in BitDefender!.