You may have heard about the new memory usage improvement feature of Microsoft Windows 10 May 2020 Update.
This feature is being used by the new Microsoft Edge Chromium-based browser ro reduce memory consumption. Also Google is looking to use this feature for Google Chrome for the same reason.
Turns out one can globally enable this feature for all applications in the Windows 10 system. I did that just to found Dropbox stopped working. It took me some hours to realize what the problem was.
If you are experiencing running and/or installation problems with Dropbox on Windows 10 after May 2020 Update you may take a look if this segment heap feature is either globally or per-executable enabled.