How do I change the WiFi password to use the ms60 mesh device

As always, the manual is a great place to start. Visit the support pages:

Support | NETGEAR

Feed in your model number and check the documentation for your hardware.

That page will also have any software, firmware and drivers for your device, if they exist.

Look for the model number on the label on the device.

Check the section in the manual Change the WiFi password or the WiFi security.

You may have done that already. I can't tell from your message.

I mention it because Netgear gave up on supplying paper manuals years ago and people sometimes miss the downloads.