I got the same problem with the AP-CBL-SERU cable. It worked on my old laptop but I got a new one. Latest windows build and the driver does not work. Downloaded the latest CP210x from support.arubanetworks.com
On my old laptop I had an older driver but I didn't keep a copy of that zip. Unfortunately that laptop became unworkable.
Windows states unknown device (request for device descriptor failed)
I really need this resolved!!
New laptop has USB C interfaces. I found that the problem lies in the USB C to USB A converters. When I use a USB A hub and put a converter in between, the cable works just fine. So now I'm on the hunt for a USB C to USB A converter that does work with the cable. All hubs and converters are USB 3.0 so it will be a hit and miss process :)
rgds,
Erik