Description of problem:
Executed Gnome-Gmail, and then it crashed. 

Version-Release number of selected component:
gnome-gmail-1.9.3.1-1.fc22

Additional info:
reporter:       libreport-2.6.2
cmdline:        python2.7 /usr/share/gnome-gmail/gnomegmail.py
dso_list:       pygobject3-base-3.16.2-1.fc22.x86_64
executable:     /usr/share/gnome-gmail/gnomegmail.py
kernel:         4.2.3-200.fc22.x86_64
runlevel:       N 5
type:           Python
uid:            1000

Truncated backtrace:
module.py:120:__init__:RepositoryError: Requiring namespace 'Gtk' version '2.0', but '3.0' is already loaded

Traceback (most recent call last):
  File "/usr/share/gnome-gmail/gnomegmail.py", line 43, in <module>
    from gi.repository import Wnck
  File "/usr/lib64/python2.7/site-packages/gi/importer.py", line 158, in load_module
    introspection_module = get_introspection_module(namespace)
  File "/usr/lib64/python2.7/site-packages/gi/module.py", line 271, in get_introspection_module
    module = IntrospectionModule(namespace, version)
  File "/usr/lib64/python2.7/site-packages/gi/module.py", line 120, in __init__
    repository.require(namespace, version)
RepositoryError: Requiring namespace 'Gtk' version '2.0', but '3.0' is already loaded

Local variables in innermost frame: