Dropbox daemon downloader freezes at 90+% on fresh Linux Mint 21.1

Hello!

Frankly, it must have been a heisenbug. I rebooted many times, downloaded the headless version, came home, retried... and the good old `dropbox_2020.03.04_amd64.deb` worked and is now syncing perfectly. It shall remain a mystery forever why it was not working... sorry for not being able to reproduce the problem, so it is solved now.

Maybe in the future, one may need to do something about the 'deprecated' warnings:

Starting Dropbox.../usr/bin/dropbox:303: PyGIDeprecationWarning: Since version 3.11, calling threads_init is no longer needed. See: https://wiki.gnome.org/PyGObject/Threading
  GObject.threads_init()
/usr/bin/dropbox:453: PyGTKDeprecationWarning: Stock items are deprecated. Please use: Gtk.Button.new_with_mnemonic(label)
  self.ok = ok = Gtk.Button(stock=Gtk.STOCK_OK)
/usr/bin/dropbox:458: PyGTKDeprecationWarning: Stock items are deprecated. Please use: Gtk.Button.new_with_mnemonic(label)
  cancel = Gtk.Button(stock=Gtk.STOCK_CANCEL)
/usr/bin/dropbox:348: DeprecationWarning: setDaemon() is deprecated, set the daemon attribute instead
  t.setDaemon(True)
/usr/bin/dropbox:334: PyGIDeprecationWarning: GObject.idle_add is deprecated; use GLib.idle_add instead
  GObject.idle_add(self.loop_callback, *ret)
/usr/bin/dropbox:344: PyGIDeprecationWarning: GObject.idle_add is deprecated; use GLib.idle_add instead
  GObject.idle_add(self.on_done)

After it reached 100%, it started loading the fq extensions without a hindrance. Thank you for your prompt reply!

Yours sincerely,

Andrew.