Description of problem:
Click on Continue after selecting the language

Version-Release number of selected component:
anaconda-27.12-1

The following was filed automatically by anaconda:
anaconda 27.12-1 exception report
Traceback (most recent call first):
  File "/usr/lib64/python3.6/site-packages/pyanaconda/ui/gui/__init__.py", line 180, in _findUIFile
    raise IOError("Could not load UI file '%s' for object '%s'" % (self.uiFile, self))
  File "/usr/lib64/python3.6/site-packages/pyanaconda/ui/gui/__init__.py", line 154, in __init__
    self.builder.add_objects_from_file(self._findUIFile(), self.builderObjects)
  File "/usr/lib64/python3.6/site-packages/pyanaconda/ui/gui/spokes/__init__.py", line 59, in __init__
    GUIObject.__init__(self, data)
  File "/usr/lib64/python3.6/site-packages/pyanaconda/ui/gui/spokes/installation_source.py", line 380, in __init__
    NormalSpoke.__init__(self, *args, **kwargs)
  File "/usr/lib64/python3.6/site-packages/pyanaconda/ui/gui/hubs/__init__.py", line 141, in _createBox
    spoke = spokeClass(self.data, self.storage, self.payload, self.instclass)
  File "/usr/lib64/python3.6/site-packages/pyanaconda/ui/gui/hubs/__init__.py", line 370, in refresh
    self._createBox()
  File "/usr/lib64/python3.6/site-packages/pyanaconda/ui/gui/__init__.py", line 1031, in _on_continue_clicked
    nextAction.refresh()
OSError: Could not load UI file 'spokes/source.glade' for object 'SourceSpoke'

Additional info:
addons:         com_redhat_kdump, com_redhat_docker
cmdline:        /usr/libexec/system-python  /sbin/anaconda
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         4.12.0-0.rc5.git0.1.fc27.x86_64
product:        Fedora
release:        Cannot get release name.
type:           anaconda
version:        rawhide