Description of problem:
Started the installation. Proceeded to the INSTALLATION SUMMARY screen. Following entries on the screen then took very long time to process (activate):

INSTALLATION SOURCE
SOFTWARE SELECTION
INSTALLATION DESTINATION

See the "disk space caching is enabled" in attached dmesg. I could hear the disks comprising my btrfs RAID1 (mounted via /dev/sdc). It sounded like the installator was traversing all files in it. I wonder why. Finally, the red label saying something like "No storage found" appeared under the INSTALLATION DESTIONATION entry. I opened the entry, selected my SSD disk (encrypted via LUKS), clicked Done, clicked Cancel, deselected the SSD disk and then clicked Done. Red label now said "No disks selected" and after a little while the error occurred. The filesystem doesn't have any subvolumes.

The INSTALLATION SOURCE entry became active just after INSTALLATION DESTIONATION became active. It shouldn't depend on existing filesystems, should it?

Version-Release number of selected component:
anaconda-23.19.4-1

The following was filed automatically by anaconda:
anaconda 23.19.4-1 exception report
Traceback (most recent call first):
  File "/tmp/updates/blivet/formats/luks.py", line 183, in _preSetup
    raise LUKSError("luks device not configured")
  File "/tmp/updates/blivet/formats/__init__.py", line 480, in setup
    if not self._preSetup(**kwargs):
  File "/tmp/updates/blivet/populator.py", line 847, in handleUdevLUKSFormat
    device.format.setup()
  File "/tmp/updates/blivet/populator.py", line 1470, in handleUdevDeviceFormat
    self.handleUdevLUKSFormat(info, device)
  File "/tmp/updates/blivet/populator.py", line 764, in addUdevDevice
    self.handleUdevDeviceFormat(info, device)
  File "/tmp/updates/blivet/populator.py", line 1695, in _populate
    self.addUdevDevice(dev)
  File "/tmp/updates/blivet/populator.py", line 1623, in populate
    self._populate()
  File "/tmp/updates/blivet/devicetree.py", line 554, in populate
    self._populator.populate(cleanupOnly=cleanupOnly)
  File "/tmp/updates/blivet/blivet.py", line 279, in reset
    self.devicetree.populate(cleanupOnly=cleanupOnly)
  File "/usr/lib64/python3.4/site-packages/pyanaconda/ui/gui/spokes/storage.py", line 361, in _doExecute
    self.storage.reset()
  File "/usr/lib64/python3.4/threading.py", line 868, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/lib64/python3.4/site-packages/pyanaconda/threads.py", line 253, in run
    threading.Thread.run(self, *args, **kwargs)
blivet.errors.LUKSError: luks device not configured

Additional info:
addons:         com_redhat_kdump
cmdline:        /usr/bin/python3  /sbin/anaconda
cmdline_file:   BOOT_IMAGE=/images/pxeboot/vmlinuz inst.stage2=hd:LABEL=Fedora-WS-23_B-x86_64 rd.live.check quiet updates=https://vtrefny.fedorapeople.org/img/btrfs.img
dnf.rpm.log:    Oct 07 19:56:17 INFO --- logging initialized ---
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         4.2.0-300.fc23.x86_64
product:        Fedora
release:        Cannot get release name.
type:           anaconda
version:        23