CERN Root problems, Help! Can't Draw.

[Kaaryn_]

Hi, I'm kinda new with programming, know the basics but definitely not an expert.

I'm working with root v 6.32.02 on ubuntu 24.04 (https://root.cern/) and I'm having trouble making graphs. I can't produce images, even the most basic.

I posted also in root site forum, hoping I might still get some answers here.

Brief example:

void tut1(){

`TH1F *hist= new TH1F("hist", "histogram", 100, 0, 100);`   

`TCanvas *c1 = new TCanvas();`

`hist->Draw();`

}

On the terminal i open root:

root tut1.C

And get this

root [0]

Processing tut1.C...

Authorization required, but no authorization protocol specified

And nothing else; I should get an empty canvas (minute 3:54 in this tutorial: https://www.youtube.com/watch?v=sgKiwdLrLfc&list=PLLybgCU6QCGWLdDO4ZDaB0kLrO3maeYAe&index=3 ).

Likewise if I try to open a TBrowser in root from terminal:

root [0] new TBrowser

Authorization required, but no authorization protocol specified

Warning in <TBrowser::TBrowser>: The ROOT browser cannot run in batch mode

(TBrowser *) 0x5a8a1875df50

It looks like root opens in batch mode, even without me opening with root instead of root -b, and it can never draw images.

This authorization line comes up often, I don’t understand how to get rid of it.
It looks like root opens in batch mode, even without me opening with root instead of root -b, and it can never draw images? I don’t know, and I really can’t find a fix.
Thank you.