"Tor log" is an automatically-generated list of Tor’s activity that can help diagnose problems.
Si quelque chose ne va pas avec Tor, vous pourriez voir une option de « copier le journal Tor dans le presse-papiers » avec le message d’erreur.
If you don't see this option and you have Tor Browser open, you can navigate to the hamburger menu ("≡"), then click on "Preferences", and finally on "Tor" in the side bar.
At the bottom of the page, next to the "View the Tor logs" text, click the button "View Logs...".
You should see an option to copy the log to your clipboard, which you can then paste to a document to show whoever is helping you troubleshoot.