Leapp upgrade fails with : Actor rpm_scanner unexpectedly terminated with exit code: 1

Issue

• Leapp upgrade fails with : Actor rpm_scanner unexpectedly terminated with exit code: 1

  ====> * rpm_scanner
      Provides data about installed RPM Packages.
  Loaded plugins: foreman-protector, product-id, subscription-manager
  Process Process-260:
  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 289, in run
  self.process(*args)
  File "/usr/share/leapp-repository/repositories/system_upgrade/common/actors/rpmscanner/actor.py", line 20, in process
  rpmscanner.process()
  File "/usr/share/leapp-repository/repositories/system_upgrade/common/actors/rpmscanner/libraries/rpmscanner.py", line 110, in process
  pkg_repos = get_package_repository_data()
  File "/usr/share/leapp-repository/repositories/system_upgrade/common/actors/rpmscanner/libraries/rpmscanner.py", line 77, in get_package_repository_data
  return _get_package_repository_data_yum()
  File "/usr/share/leapp-repository/repositories/system_upgrade/common/actors/rpmscanner/libraries/rpmscanner.py", line 31, in _get_package_repository_data_yum
  for pkg in yum_base.doPackageLists().installed:
  File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 2981, in doPackageLists
  avail = self.pkgSack.returnNewestByNameArch(patterns=patterns,
  File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 1075, in <lambda>
  pkgSack = property(fget=lambda self: self._getSacks(),
  File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 778, in _getSacks
  self.repos.populateSack(which=repos)
  File "/usr/lib/python2.7/site-packages/yum/repos.py", line 347, in populateSack
  self.doSetup()
  File "/usr/lib/python2.7/site-packages/yum/repos.py", line 157, in doSetup
  self.retrieveAllMD()
  File "/usr/lib/python2.7/site-packages/yum/repos.py", line 88, in retrieveAllMD
  dl = repo._async and repo._commonLoadRepoXML(repo)
  File "/usr/lib/python2.7/site-packages/yum/yumRepo.py", line 1482, in _commonLoadRepoXML
  result = self._getFileRepoXML(local, text)
  File "/usr/lib/python2.7/site-packages/yum/yumRepo.py", line 1259, in _getFileRepoXML
  size=102400) # setting max size as 100K
  File "/usr/lib/python2.7/site-packages/yum/yumRepo.py", line 1042, in _getFile
  raise e
  NoMoreMirrorsRepoError: failure: repodata/repomd.xml from rhel-7-server-rpms: [Errno 256] No more mirrors to try.
  https://cdn.redhat.com/content/dist/rhel/server/7/8.6/x86_64/os/repodata/repomd.xml: [Errno 14] HTTPS Error 404 - Not Found