Hi! It looks like you are using torbrowser-launcher, there is an issue with it: Completely broken for 12.0 because of hardcoded locale · Issue #659 · micahflee/torbrowser-launcher · GitHub
Please note that Tor Browser Launcher is not maintained by Tor Project and if you believe the error is caused by something different, I’d encourage you to report to that repo.
You can also alternatively install by following the instructions, here: INSTALLATION | Tor Project | Tor Browser Manual