Cloud Drive Mapper has mapped the drives and reports them as mapped but they are not seen within Explorer.

The most likely cause for this is that a certain permission hasn't been applied to the particular site in Sharepoint to which the mapping refers.

There is a tick box that needs to be applied to which ever role the user is a member of. EG Sharepoint Visitors > Read Permission

Navigate to Sharepoint Site Permissions then follow the direction as described below.

Under >  Site Permissions   >  Browse Directories  -  Enumerate files and folders in a Web site using SharePoint Designer and Web DAV interfaces

To get to this location see screenshots below

Step 1 - Click Permission Levels

Step 2 - Click Read

Step 3 - Permissions Levels Screen ( Scroll down to 2nd image section - Site Permissions > click Browse Directories - Enumerate files and folders in a Web site using Sharepoint Designer and Web DAV interfaces )