Description of problem:
Anaconda crashes on startup

Additional info:

fedora Mate Dekstop image 2015-07-18

output:

[root@localhost liveuser]# anaconda
Starting installer, one moment...
Traceback (most recent call last):
  File "/usr/sbin/anaconda", line 865, in <module>
    from pyanaconda import kickstart
  File "/usr/lib64/python3.4/site-packages/pyanaconda/kickstart.py", line 65, in <module>
    from pyanaconda.bootloader import GRUB2, get_bootloader
  File "/usr/lib64/python3.4/site-packages/pyanaconda/bootloader.py", line 42, in <module>
    from pyanaconda.packaging.rpmostreepayload import RPMOSTreePayload
  File "/usr/lib64/python3.4/site-packages/pyanaconda/packaging/rpmostreepayload.py", line 35, in <module>
    gi.require_version("OSTree", "1.0")
  File "/usr/lib64/python3.4/site-packages/gi/__init__.py", line 102, in require_version
    raise ValueError('Namespace %s not available' % namespace)
ValueError: Namespace OSTree not available
[root@localhost liveuser]# 

Version-Release number of selected component:
anaconda-core-23.15-1.fc23


Additional info:
cmdline:        /usr/bin/python3 /usr/sbin/anaconda
executable:     /usr/sbin/anaconda
kernel:         4.2.0-0.rc2.git0.1.fc23.x86_64
runlevel:       N 5
type:           Python3
uid:            0

Potential duplicate: bug 1243543