Happy New Year everyone - all the very best for 2022

@flohack Many thanks. I'll keep looking ...

@lakotaubp @Flohack I decided to have another go
Unfortunately keep getting the following error:

'DevTools failed to load SourceMap: Could not parse content for file:///C:/Users/irish/AppData/Local/Temp/1pKo5oFvBGGJjuKuJj6J9PCPTKO/resources/app.asar/src/html/bootstrap.min.css.map: Unexpected end of JSON input'

Any ideas anyone?

@lakotaubp I agree, it is very odd. I successfully installed UT to op3t in the past, so I really am not sure why on this install, the usb connection seems to be dropped at EXACTLY the same point in each installation cycle I have attempted. BTW I am trying to install from the stable channel - the default in the Installer.
UPDATE -have reinstalled Oxygen (the standard OnePlus O/S) because appaarantly there may be a firmware issue that needs addressed...... I'll ket you know

@lakotaubp yes, I have, thanks..

@saveurlinux Yep, tried all three USB ports and cables...

No, not a dumb question. But, yes, I have - 3 of them!

Hi, I've been bashing my head trying to load UT onto a op3. I Have followed the instructions, and yet when it gets to pushing the files to the device I getting a 'connection lost to device USB cable problem' type message. The developer tools are showing this:

DevTools failed to load SourceMap: Could not parse content for file:///C:/Users/irish/AppData/Local/Temp/1raG3Aut6N5DTMPVp2eiGFFUdbP/resources/app.asar/src/html/bootstrap.min.css.map: Unexpected end of JSON input

This is happening with all installers - from 7.54 - 8.8
Thoughts?
Thanks, R

@guru Have a look at a website http://time.is From memory it will show the seconds as you require them.

And I am the (very happy) purchaser! Many thanks!