I've migrated the owners Intel MacBook to a new M2 MacBook Pro
The migration went fine, but Dropbox wouldn't start afterwards.
I removed the app and ran the installer from the web page, it downloaded, launched the setup window, confirmed creds (incl MFA) just fine, then goes to a blank white window with a little pink box that says only "There was a problem completing this request"
After a bit, the pink box clears, leaving a white window.
The icon does not appear in the top bar, the app won't launch from the application folder.
There are a series of processes in Activity Monitor that look like they apply to Dropbox.
Since then I've rebooted, uninstalled from an offline silicon mac installer, removed /library/dropboxhelper and ~/.dropbox and tried an installer from a couple of versions back (all stable, no beta) - always the same result, pink box on white window.
User does have admin rights.
What do I do next to work this out?