Hi @RENATO_QUAGLIANI ,
Unfortunately the 3.11 upgrade is proving to be an issue for many Python packages. I’m sorry you had to go through that pain, I just wanted to specify that unless you need to modify ROOT yourself, you should install it via some package manager. For example in this post I described how to do so in a couple lines with mamba ROOT build with Python 3.7 in centos7 - #8 by vpadulan (in your case you can just write python==3.11.* to specify the python version). Other installation instructions are at Installing ROOT - ROOT
Regarding the warnings in Jupyter lab, I’ve never seen them. The first one is suppressable via the suggested environment variable I guess, I don’t know what to do for the others. I can try to investigate, I’ll let you know if I find anything.
Cheers,
Vincenzo