Exciting GW fails

Here is an example (it is still unpublished, can be accessed with admin account). https://nomad-lab.eu/prod/rae/gui/entry/id/6euI333RSOCAoUWxvakmPQ/POxqKjn2RUsmR7oK5yN32hszq5oP/logs

Traceback (most recent call last):
  File "/app/nomad/processing/data.py", line 466, in parsing
    self._parser_results, logger=logger)
  File "/usr/local/lib/python3.7/site-packages/excitingparser/exciting_parser.py", line 2269, in parse
    self.parse_gw()
  File "/usr/local/lib/python3.7/site-packages/excitingparser/exciting_parser.py", line 1809, in parse_gw
    sec_scc.single_configuration_calculation_to_system_ref = sec_run.section_system[-1]
IndexError: list index out of range

Same issue in ~72 cases for upload 6euI333RSOCAoUWxvakmPQ

This needs to be fixed on branch v0.10.8 (and v1.0.0)