Why does Leapp Upgrade fails with error "[Errno 2] No such file or directory: '/var/lib/leapp/scratch/mounts/root_/system_overlay/etc/pki/tls/certs/.0'" ?

Issue

• When leapp upgrade is run, it fails with below traceback error:

Traceback (most recent call last):
  File "/usr/lib64/python2.7/multiprocessing/process.py", line 258, in _bootstrap
    self.run()
  File "/usr/lib64/python2.7/multiprocessing/process.py", line 114, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/lib/python2.7/site-packages/leapp/repository/actor_definition.py", line 72, in _do_run
    actor_instance.run(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/leapp/actors/__init__.py", line 290, in run
    self.process(*args)
  File "/usr/share/leapp-repository/repositories/system_upgrade/common/actors/targetuserspacecreator/actor.py", line 52, in process
    userspacegen.perform()
  File "/usr/lib/python2.7/site-packages/leapp/utils/deprecation.py", line 42, in process_wrapper
    return target_item(*args, **kwargs)
  File "/usr/share/leapp-repository/repositories/system_upgrade/common/actors/targetuserspacecreator/libraries/userspacegen.py", line 674, in perform
    _create_target_userspace(context, indata.packages, indata.files, target_repoids)
  File "/usr/share/leapp-repository/repositories/system_upgrade/common/actors/targetuserspacecreator/libraries/userspacegen.py", line 648, in _create_target_userspace
    _prep_repository_access(context, target_path)
  File "/usr/share/leapp-repository/repositories/system_upgrade/common/actors/targetuserspacecreator/libraries/userspacegen.py", line 231, in _prep_repository_access
    context.copytree_from('/etc/pki', os.path.join(target_etc, 'pki'))
  File "/usr/share/leapp-repository/repositories/system_upgrade/common/libraries/mounting.py", line 221, in copytree_from
    shutil.copytree(self.full_path(src), dst)
  File "/usr/lib64/python2.7/shutil.py", line 208, in copytree
    raise Error, errors
Error: [('/var/lib/leapp/scratch/mounts/root_/system_overlay/etc/pki/tls/certs/.0', '/var/lib/leapp/el8userspace/etc/pki/tls/certs/.0', "[Errno 2] No such file or directory: '/var/lib/leapp/scratch/mounts/root_/system_overlay/etc/pki/tls/certs/.0'")]