Description of problem:
I booted off a usb thumb drive for installing Fedora. I hit OK on the initial screen. I plugged in an ethernet cable, then clicked on partitioning, then clicked Done to use the default partitioning. It was when I clicked Done that I hit this error.

Version-Release number of selected component:
anaconda-23.19.10-1

The following was filed automatically by anaconda:
anaconda 23.19.10-1 exception report
Traceback (most recent call first):
  File "/usr/lib64/python3.4/site-packages/pyanaconda/packaging/dnfpayload.py", line 550, in spaceRequired
    for (key, val) in self.storage.mountpoints.items():
  File "/usr/lib64/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/lib64/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:
addons:         com_redhat_kdump
cmdline:        /usr/bin/python3  /sbin/anaconda
cmdline_file:   BOOT_IMAGE=vmlinuz initrd=initrd.img inst.stage2=hd:LABEL=Fedora-WS-23-x86_64 quiet
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         4.2.3-300.fc23.x86_64
product:        Fedora
release:        Cannot get release name.
type:           anaconda
version:        23