Description of problem:
I have been having problems re-installing my system (bz 1477351) and so I decided to try with a regular Fedora version rather than rawhide. I went through the configuration steps, but the installer again had issues.

Version-Release number of selected component:
anaconda-26.21.11-1

The following was filed automatically by anaconda:
anaconda 26.21.11-1 exception report
Traceback (most recent call first):
  File "/usr/lib/python3.6/site-packages/blivet/formats/__init__.py", line 558, in _pre_destroy
    raise DeviceFormatError("device path does not exist or is not writable")
  File "/usr/lib/python3.6/site-packages/blivet/threads.py", line 45, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/blivet/formats/__init__.py", line 545, in destroy
    self._pre_destroy(**kwargs)
  File "/usr/lib/python3.6/site-packages/blivet/threads.py", line 45, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/blivet/deviceaction.py", line 696, in execute
    self.format.destroy()
  File "/usr/lib/python3.6/site-packages/blivet/threads.py", line 45, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/blivet/actionlist.py", line 325, in process
    action.execute(callbacks)
  File "/usr/lib/python3.6/site-packages/blivet/actionlist.py", line 48, in wrapped_func
    return func(obj, *args, **kwargs)
  File "/usr/lib/python3.6/site-packages/blivet/blivet.py", line 163, in do_it
    self.devicetree.actions.process(callbacks=callbacks, devices=self.devices)
  File "/usr/lib/python3.6/site-packages/blivet/threads.py", line 45, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/blivet/osinstall.py", line 1112, in turn_on_filesystems
    storage.do_it(callbacks)
  File "/usr/lib64/python3.6/site-packages/pyanaconda/install_tasks.py", line 437, in run_task
    self._task(*self._task_args, **self._task_kwargs)
  File "/usr/lib64/python3.6/site-packages/pyanaconda/install_tasks.py", line 471, in start
    self.run_task()
  File "/usr/lib64/python3.6/site-packages/pyanaconda/install_tasks.py", line 303, in start
    item.start()
  File "/usr/lib64/python3.6/site-packages/pyanaconda/install_tasks.py", line 303, in start
    item.start()
  File "/usr/lib64/python3.6/site-packages/pyanaconda/install.py", line 363, in doInstall
    installation_queue.start()
  File "/usr/lib64/python3.6/threading.py", line 864, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/lib64/python3.6/site-packages/pyanaconda/threads.py", line 251, in run
    threading.Thread.run(self)
blivet.errors.DeviceFormatError: device path does not exist or is not writable

Additional info:
addons:         com_redhat_kdump, com_redhat_docker
cmdline:        /usr/libexec/system-python  /sbin/anaconda
cmdline_file:   BOOT_IMAGE=vmlinuz initrd=initrd.img inst.stage2=hd:LABEL=Fedora-WS-dvd-x86_64-26 quiet
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         4.11.8-300.fc26.x86_64
product:        Fedora
release:        Cannot get release name.
type:           anaconda
version:        26