Traceback (most recent call last):
  File "/usr/bin/unattended-upgrade", line 538, in <module>
    main()
  File "/usr/bin/unattended-upgrade", line 394, in main
    if conffile_prompt(item.destfile):
  File "/usr/bin/unattended-upgrade", line 160, in conffile_prompt
    open(destFile), "conffiles")
SystemError: E:Unparsable control file