Tor Browser Downloader by Whonix will currently show.
ERROR:
Could not find out latest Tor Browser version! Excessive version string length. (323 characters) Either check.torproject.org has been compromised or this is a Whonix bug.
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/Stay_Tuned
Manually update: https://www.whonix.org/wiki/Manually_Updating_Tor_Browser
This is a known bug. No indicator for a security concern. It has already been reported to Tor Project:
Broken redirect on https://www.torproject.org/projects/torbrowser/RecommendedTBBVersions
Meanwhile please refer to: