Windows 10 Home, Cura2 2.6.19, High Quality ABS IC3D
Skirt not working solved. When Cura2 is first installed, the config file that holds the setting for "Build Plate Adhesion Type" was already modified to "None". When I clicked on the symbol to reset that field back to the default, it changed to "Skirt". From then on, Skirt worked.
The strange thing is that previous print jobs took an hour and 15 minutes. After fixing the Skirt issue, the same print object only took 12 minutes to print.