Edit: On to something here. . .
ERROR: Failed to [b]download: https://dist.torproject.org/torbrowser/5.5a4-hardened/tor-browser-linux64-5.5a4-hardened_en-US.tar.xz[/b] Possible reasons:
- The download server is down. - File size exceeded (endless data attack triggered). - Tor Browser Downloader (by Whonix developers) has been broken due to upstream changes. Recommendations: - Try again later. If the error persists it probably won't solve itself before the next update. - Check News: https://www.whonix.org/wiki/Download#Stay_tuned - Manually update: https://www.whonix.org/wiki/Manually_Updating_Tor_Browser (Debugging information: curl_status_message:  - [HTTP page not retrieved. The requested url was not found or returned another error with the HTTP error code being 400 or above. This return code only appears if -f, --fail is used.])</blockquote>
Edit by Patrick: