QuickFix: BrandCam Not Opening
If BrandCam is not opening for you, it is due to your device permissions. As BrandCam is a camera app, you need to give the app permission to use your iPhones camera and microphone, which you may have accidentally disabled when promoted on the first time you opened the app.
To enable these settings, do the following:
Settings > Privacy > Camera > Enable BrandCam
Settings > Privacy > Microphone > Enable BrandCam