I have been struggling with this issue with no positive results.
I am not sure if this might be the root of the problem, but when I use Zadig to install drivers, I select Interface 0 and load “USB Serial (CDC)”, but I do not get a green check mark on the WCID box. If I select Interface 2 and inmediately go back to Interface 0 the box remains with a red cross and on the selectable driver list box I have WinUSB (v6.1.7600.16385). Should this selector show what is installed at that interface or is that the dafault value when you change to any interface?
Anyway, despite how that selector box is filled, I think the problem is that I have a red cross on the WCID.
This URL seemed to be the solution to my difficulties but I think I am stuck at the driver level.