Bricked WIO Terminal ---Maybe?

Greetings

I think I may have BRICKED my WiO Terminal
My two laptops cannot find the WIO Terminal their Com ports.
Only the green lamp lights up.
I went to the Seeed Studio Wiki to try an load/install new firmware

As per WIO Wiki
I opened the power shell and typed:

cd -
git clone https://github.com/Seeed-Studio/ambd _flash_tool

My pc with Win10 displayed error messages and would not pick up or install the specified files needed to erase factory firmware.
I don’t know what to to do at this point - can someone help?
Thanks
Tom