If you receive a blank white screen during the process of authenticating and setting up a OneDrive or OneDrive for Business site profile, open Internet Explorer/Edge and login to your OneDrive/OneDrive for Business account and then logout. Then setup the site profile in WebDrive. 

If the browser already has the authentication token that is received from you logging into the browser, then OneDrive does not believe it needs to send a new token, which WebDrive needs in order to authenticate and be granted access to OneDrive folders and files.

If the issue is occurring on a Windows Server Operating System, please also relax/remove the Enhanced Security Configuration in IE, as Server products have more security features that may prevent WebDrive from accessing the browser window properly.