bolded textRe: Anyone tried installing another OS on a Ubuntu Touch X23

Hi

I have got following instructions on how to install Volla OS onto my Volla X23 phone which has installed by manufacturer Ubuntu Touch.

Here it is
https://drive.google.com/file/d/1ohEZOQpb0plpYZqh80TIVJIxdRwwol9T/view?usp=drivesdk

But even though I was trying hard with available to me combinations of UBPorts installer (latest 0.11.2 and 0.10.0) and environment (Linux, Windows), despite that flashing was always failing with the same error "Partition does not exist".

Here's screenshot
https://photos.app.goo.gl/defCQwhhmbGpjcsx9

If someone succeeded with that task, could you please share how. Or suggest me what I can try more?

I should mention that I have flashed Ubuntu Touch back again without any problems after failed attempt to install Volla OS.