Description of problem:
network installion using F21 Alpha TC5 Server repo

Version-Release number of selected component:
anaconda-21.48.3-1

The following was filed automatically by anaconda:
anaconda 21.48.3-1 exception report
Traceback (most recent call first):
  File "/usr/lib/python2.7/site-packages/gi/types.py", line 234, in __init__
    register_interface_info(cls.__info__.get_g_type())
  File "/usr/lib/python2.7/site-packages/gi/module.py", line 222, in __getattr__
    wrapper = metaclass(name, bases, dict_)
  File "/usr/lib/python2.7/site-packages/gi/module.py", line 320, in __getattr__
    return getattr(self._introspection_module, name)
  File "/usr/lib/python2.7/site-packages/gi/module.py", line 109, in get_interfaces_for_object
    interfaces.append(getattr(module, name))
  File "/usr/lib/python2.7/site-packages/gi/module.py", line 183, in __getattr__
    interfaces = tuple(interface for interface in get_interfaces_for_object(info)
  File "/usr/lib/python2.7/site-packages/gi/overrides/Gtk.py", line 118, in <module>
    class Widget(Gtk.Widget):
  File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/usr/lib/python2.7/site-packages/gi/module.py", line 296, in _load
    self._overrides_module = importlib.import_module('gi.overrides.' + self._namespace)
  File "/usr/lib/python2.7/site-packages/gi/importer.py", line 67, in load_module
    dynamic_module._load()
  File "/usr/lib/python2.7/site-packages/pyanaconda/exception.py", line 103, in handleException
    from gi.repository import Gtk
  File "/usr/lib/python2.7/site-packages/meh/handler.py", line 161, in <lambda>
    self.handleException(DumpInfo(ExceptionInfo(ty, value, tb), obj))
  File "/usr/lib/python2.7/site-packages/pyanaconda/ui/tui/__init__.py", line 52, in exception_msg_handler
    sys.excepthook(*msg_data[0])
  File "/usr/lib/python2.7/site-packages/pyanaconda/ui/tui/simpleline/base.py", line 399, in process_events
    handler(event, data)
TypeError: must be an interface

Additional info:
addons:         com_redhat_kdump
cmdline:        /usr/bin/python  /sbin/anaconda
cmdline_file:   console=ttyS0,115200 ip=eth0:dhcp inst.repo=http://dl.fedoraproject.org/pub/alt/stage/21-Alpha-TC5/Server/armhfp/os/
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         3.16.1-301.fc21.armv7hl
product:        Fedora-Server
release:        Cannot get release name.
type:           anaconda
version:        21-Alpha-TC5