Leapp preupgrade from RHEL 8 to RHEL 9 fails with: ERROR PID: 8044 leapp.repository.system_upgrade_common: Process inspecting actor in actors/peseventsscanner failed with 1

Issue

• Leapp preupgrade from RHEL 8 to RHEL 9 fails with :

  Process Process-21:
  Traceback (most recent call last):
   File "/usr/lib64/python2.7/multiprocessing/process.py", line 267, 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 31, in inspect_actor
     definition.load()
   File "/usr/lib/python2.7/site-packages/leapp/repository/actor_definition.py", line 196, in load
     self._module = importer.find_module(name).load_module(name)
   File "/usr/lib64/python2.7/pkgutil.py", line 243, in load_module
     mod = imp.load_module(fullname, self.file, self.filename, self.etc)
   File "/usr/share/leapp-repository/repositories/system_upgrade/common/actors/peseventsscanner/actor.py", line 2, in <module>
     from leapp.libraries.actor.pes_events_scanner import process
   File "/usr/lib64/python2.7/pkgutil.py", line 243, in load_module
     mod = imp.load_module(fullname, self.file, self.filename, self.etc)
   File "/usr/share/leapp-repository/repositories/system_upgrade/common/actors/peseventsscanner/libraries/pes_events_scanner.py", line 7, in <module>
     from leapp.libraries.actor.pes_event_parsing import Action, get_pes_events, Package
   File "/usr/lib64/python2.7/pkgutil.py", line 243, in load_module
     mod = imp.load_module(fullname, self.file, self.filename, self.etc)
   File "/usr/share/leapp-repository/repositories/system_upgrade/common/actors/peseventsscanner/libraries/pes_event_parsing.py", line 4, in <module>
     from enum import IntEnum
  ImportError: No module named enum
  2024-09-27 15:55:37.151 ERROR    PID: 8044 leapp.repository.system_upgrade_common: Process inspecting actor in actors/peseventsscanner failed with 1