WARNING: Running pip as the 'root' user can result in broken permissions

Hi.
Good afternoon.
I’m unable to install Umbrel on Xubuntu.
It ends WITHOUT SUCCESS right after the message:
WARNING: Running pip as the 'root' user can result in broken permissions and conflicting behaviour with the system package manager. It is recommended to use a virtual environment instead: https://pip.pypa.io/warnings/venv
Any guidance please?
Tks.

EDIT:
I switched to Ubuntu Server and the problem continues.
I followed the steps as per the user’s tip: @m4tuu

But I was unsuccessful!