Hello! Some relevant discussion in Forum thread: Error warning shows up randomly although Tor Browser seems to be working fine and is connected to Tor
… and this bug report: Improve error recovery from the red screen of death (#32328) · Issues · The Tor Project / Applications / Tor Browser · GitLab
@Gozo, can you please check in your Tor logs if Tor is bootstrapping successfully? To view your Tor logs navigate to the hamburger menu (“≡”), then click on “Settings”, and finally on “Connection” in the side bar. At the bottom of the page, next to the “View the Tor logs” text, click the button “View Logs…”.