[Piuparts-reports] problem with piuparts-slave detected

[piuparts slave]

Either a test is running for a very long time (more than 90 minutes),
or piuparts-slave hangs or is not running at all or wasn't started with
~piupartss/bin/slave_run - please investigate and take appropriate measures!

  File "/srv/piuparts.debian.org/share/piuparts/piuparts-slave", line 968, in main
    sections.append(Section(section_name, persistent_connection))
  File "/srv/piuparts.debian.org/share/piuparts/piuparts-slave", line 363, in __init__
    self._check_tarball()
  File "/srv/piuparts.debian.org/share/piuparts/piuparts-slave", line 442, in _check_tarball
    create_chroot(self._config, tgz, self._config.get_start_distro())
  File "/srv/piuparts.debian.org/share/piuparts/piuparts-slave", line 911, in create_chroot
    with open(output_name, "we") as output:
IOError: [Errno 2] No such file or directory: '/srv/piuparts.debian.org/slave/basetgz/buster/updates_amd64.tar.gz.log'
piupartss at piu-slave-ubc-01:/srv/piuparts.debian.org/slave/1$