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Can not load usb drivers on SAMD21 Pro RF.

Windows 7
Arduino IDE 1.83
Arduino SAMD Boards (32-bits ARM Cortex-M0+) version 1.6.19
Lastest Sparkfun Board Definition

In the Arduino IDE
From Tools "Sparkfun SAMD21 Pro RF" can be selected
From Tools "Port" is ghosted out and no port can be selected

In windows device manager
No COM ports are listed
Under "Other devices" SparkFun SAMD21 Pro RF shows up but the driver can not update

Out of desperation I tried using the SparkFun-SAMD21-Driver-111115 drivers with no luck.

How do I install the proper drivers for these boards.