Geary doesn't go to tray when launched from console but works with GUI

Bug report:

1. AllTray version 0.7.5.1dev
2. Installed from official arch community repository
3. Arch Linux, XFCE 4.14, default xfce window manager
4. Steps to reproduce the bug:
Prerequisite: geary must be installed

Typing `alltray geary` in console launches geary but does not add it to tray.

The output of the error is as follows:

$ alltray geary
AllTray 0.7.5.1dev
Copyright © 2009, 2010 Michael B. Trausch <email address hidden>
Licensed under the GNU GPL v3.0 as published by the Free Software Foundation.

AllTray was unable to attach to any applications, and AllTray's child
has died.

This problem can be caused by application software that:
  * is not compliant with the ICCCM and EWMH specs,
  * backgrounds itself and leaves the AllTray process group, or
  * unexpectedly died an early death and did not actually start

If the problem is one of the first two problems, please report a bug
in AllTray and it will be investigated and reported to the correct
project, if necessary. If the problem is the third one, then you will
need to fix whatever went wrong and try again.

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Using the GUI geary's icon is added to tray, but I'd like to have geary launch at startup with -C flag, so console command is needed to run.