What is this about and how do you remedy it?
The Tor Browser in Whonix is not updating using Qubes Update tool, you need to update it using Tor Browser Downloader (AnonDist)
in Whonix Workstation template.
http://www.dds6qkxpwdeubwucdiaord2xgbbeyds25rbsgr73tbfpqpt4a6vjwsyd.onion/wiki/Qubes/Tor_Browser#Update_Tor_Browser
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