After running "ipa-backup" script IPA service didn't come up.

Issue

• Scheduled the ipa-backup script made IPA server offline because the IPA services didn't come up after running the scheduled ipa-backup.
• After running ipa-backup script IPA services didn't come up.
• ipa-backup script failed with error:

2018-10-01T20:00:20Z DEBUG   File "/usr/lib/python2.7/site-packages/ipapython/admintool.py", line 172, in execute
    return_value = self.run()
  File "/usr/lib/python2.7/site-packages/ipaserver/install/ipa_backup.py", line 321, in run
    self.finalize_backup(options.data_only, options.gpg, options.gpg_keyring)
  File "/usr/lib/python2.7/site-packages/ipaserver/install/ipa_backup.py", line 597, in finalize_backup
    os.mkdir(backup_dir)

2018-10-01T20:00:20Z DEBUG The ipa-backup command failed, exception: OSError: [Errno 2] No such file or directory: '/var/lib/ipa/backup/ipa-full-2018-10-01-23-00-20'
2018-10-01T20:00:20Z ERROR [Errno 2] No such file or directory: '/var/lib/ipa/backup/ipa-full-2018-10-01-23-00-20'
2018-10-01T20:00:20Z ERROR The ipa-backup command failed. See /var/log/ipabackup.log for more information