Error using Installer: Cannot read Properties of null (reading 'getWriter')

[aparker21]

I am getting the following error when trying to flash using the Installer at https://circuitpython.org/board/lilygo_twatch_2020_v3/

Installation Error: Unable to flash file: adafruit-circuitpython-lilygo_twatch_2020_v3-en_US-9.2.1.bin. Error Message: TypeError: Cannot read properties of null (reading 'getWriter')