Version-Release number of selected component:
anaconda-core-23.19.10-1.fc23.i686

The following was filed automatically by anaconda:
anaconda 23.19.10-1 exception report
Traceback (most recent call first):
  File "/usr/lib/python3.4/site-packages/pyanaconda/packaging/dnfpayload.py", line 550, in spaceRequired
    for (key, val) in self.storage.mountpoints.items():
  File "/usr/lib/python3.4/site-packages/pyanaconda/ui/gui/spokes/storage.py", line 817, in _check_space_and_get_dialog
    required_space = self.payload.spaceRequired
  File "/usr/lib/python3.4/site-packages/pyanaconda/ui/gui/spokes/storage.py", line 964, in on_back_clicked
    dialog = self._check_space_and_get_dialog(disks)
AttributeError: 'NoneType' object has no attribute 'mountpoints'

Additional info:
cmdline:        /usr/bin/python3  /usr/sbin/anaconda
cmdline_file:   BOOT_IMAGE=/vmlinuz-4.5.4-200.fc23.i686 root=/dev/mapper/fedora-root ro rd.lvm.lv=fedora/root rd.lvm.lv=fedora/swap rhgb quiet LANG=en_US.UTF-8
executable:     /usr/sbin/anaconda
hashmarkername: anaconda
kernel:         4.5.4-200.fc23.i686
other involved packages: anaconda-gui-23.19.10-1.fc23.i686
product:        Fedora
release:        Fedora release 23 (Twenty Three)
type:           anaconda
version:        23

This is a private, duplicate bug report of bug 1304480. The report has been created because Bugzilla cannot grant access to a comment for a specific group.