Why is my Tor service not working?
If Tor Browser was working before and is not working now your system may have been hibernating. A reboot of your system will solve the issue. Delete Tor Browser and install it again. If updating, do not just overwrite your previous Tor Browser files; ensure they are fully deleted beforehand.
How to enable Tor service in Kali Linux?
Steps to Access Dark Web using Tor Browser in Kali Linux
Step 1: Open the Terminal and go with the following commands. The first command is to update the package database with the most recent changes. The second command is to install the Tor service and Tor Browser Launcher including signature verification.