I’m guessing this is from the Tor Browser update to 9.0.1 but I haven’t tried to run the browser since several small Whonix updates either so:
"ERROR: Tor Browser ended with non-zero (error) exit code!
Tor Browser was started with:
/home/user/.tb/tor-browser/Browser/start-tor-browser --allow-remote /usr/share/homepage/whonix-welcome-page/whonix.html.
Tor Browser exited with code: 2
To see this for yourself, you could try:
Start Menu -> System -> Xfce Terminal