Leapp fails with a mount error

Issue

• The following errors can be seen during the reboot step:

  upgrade[679]: CalledProcessError: Command ['/bin/mount', '-a'] failed with exit code 32.
  :
  upgrade[679]: Container sysroot failed with error code 1.
  upgrade[679]: writing logs to disk and rebooting
  upgrade[679]: /bin/upgrade: line 19: /sysroot/var/tmp/system-upgrade.state: Read-only file system
  systemd[1]: upgrade.service: Main process exited, code=exited, status=1/FAILURE
  

  OR leapp-upgrade.log shows following log :

  2024-03-12 14:09:48.818 DEBUG    PID: 397 leapp.workflow.InitRamStart.remove_upgrade_boot_entry: External command has started: ['/bin/mount', '-a']
  2024-03-12 14:09:48.827 DEBUG    PID: 397 leapp.workflow.InitRamStart.remove_upgrade_boot_entry: mount: ext4: mount point does not exist.
  2024-03-12 14:09:48.831 DEBUG    PID: 397 leapp.workflow.InitRamStart.remove_upgrade_boot_entry: Command ['/bin/mount', '-a'] failed with exit code 32.
  2024-03-12 14:09:48.837 DEBUG    PID: 397 leapp.workflow.InitRamStart.remove_upgrade_boot_entry: External command has finished: ['/bin/mount', '-a']
  2024-03-12 14:09:48.857 ERROR    PID: 3 leapp.workflow.InitRamStart: Actor remove_upgrade_boot_entry has crashed: Traceback (most recent call last):
    File "/usr/lib/python3.6/site-packages/leapp/repository/actor_definition.py", line 74, in _do_run
      actor_instance.run(*args, **kwargs)
    File "/usr/lib/python3.6/site-packages/leapp/actors/__init__.py", line 289, in run
      self.process(*args)
    File "/etc/leapp/repos.d/system_upgrade/common/actors/removeupgradebootentry/actor.py", line 20, in process
      remove_boot_entry()
    File "/etc/leapp/repos.d/system_upgrade/common/actors/removeupgradebootentry/libraries/removeupgradebootentry.py", line 41, in remove_boot_entry
      '/bin/mount', '-a'
    File "/usr/lib/python3.6/site-packages/leapp/libraries/stdlib/__init__.py", line 192, in run
      result=result
  leapp.libraries.stdlib.CalledProcessError: Command ['/bin/mount', '-a'] failed with exit code 32.