RHEL7: Collecting sosreport failed with IOError: [Errno 2] No such file or directory: '/var/tmp/xxx.tar.xz'

Issue

sosreport command is failed with logs

Creating compressed archive...
Traceback (most recent call last):
  File "/sbin/sosreport", line 25, in <module>
    main(sys.argv[1:])
  File "/usr/lib/python2.7/site-packages/sos/sosreport.py", line 1637, in main
    sos.execute()
  File "/usr/lib/python2.7/site-packages/sos/sosreport.py", line 1616, in execute
    return self.final_work()
  File "/usr/lib/python2.7/site-packages/sos/sosreport.py", line 1529, in final_work
    checksum = self._create_checksum(archive, hash_name)
  File "/usr/lib/python2.7/site-packages/sos/sosreport.py", line 1467, in _create_checksum
    archive_fp = open(archive, 'rb')
IOError: [Errno 2] No such file or directory: '/var/tmp/sos.SKPcFL/sosreport-unicymdctr0001.localdomain-20181004144559.tar.xz'