after instalation to debian buster dbupdate failed

[vlado labath]

mediagoblin@magor:/srv/mediagoblin.example.org/mediagoblin$ ./bin/gmg
dbupdate
Traceback (most recent call last):
  File "./bin/gmg", line 11, in <module>
    load_entry_point('mediagoblin', 'console_scripts', 'gmg')()
  File
"/srv/mediagoblin.example.org/mediagoblin/mediagoblin/gmg_commands/__init__.py",
line 148, in main_cli
    args.func(args)
  File
"/srv/mediagoblin.example.org/mediagoblin/mediagoblin/gmg_commands/dbupdate.py",
line 235, in dbupdate
    global_config, app_config = setup_global_and_app_config(args.conf_file)
  File
"/srv/mediagoblin.example.org/mediagoblin/mediagoblin/init/__init__.py",
line 48, in setup_global_and_app_config
    global_config, validation_result = read_mediagoblin_config(config_path)
  File
"/srv/mediagoblin.example.org/mediagoblin/mediagoblin/init/config.py",
line 89, in read_mediagoblin_config
    mainconfig_defaults = copy.copy(config_spec.get("DEFAULT", {}))
  File "/srv/mediagoblin.example.org/mediagoblin/lib/python3.7/copy.py",
line 96, in copy
    rv = reductor(4)
  File
"/srv/mediagoblin.example.org/mediagoblin/lib/python3.7/site-packages/configobj-5.0.6-py3.7.egg/configobj.py",
line 482, in __reduce__
  File
"/srv/mediagoblin.example.org/mediagoblin/lib/python3.7/site-packages/configobj-5.0.6-py3.7.egg/configobj.py",
line 557, in __getitem__
  File
"/srv/mediagoblin.example.org/mediagoblin/lib/python3.7/site-packages/configobj-5.0.6-py3.7.egg/configobj.py",
line 549, in _interpolate
  File
"/srv/mediagoblin.example.org/mediagoblin/lib/python3.7/site-packages/configobj-5.0.6-py3.7.egg/configobj.py",
line 352, in interpolate
  File
"/srv/mediagoblin.example.org/mediagoblin/lib/python3.7/site-packages/configobj-5.0.6-py3.7.egg/configobj.py",
line 330, in recursive_interpolate
  File
"/srv/mediagoblin.example.org/mediagoblin/lib/python3.7/site-packages/configobj-5.0.6-py3.7.egg/configobj.py",
line 417, in _parse_match
  File
"/srv/mediagoblin.example.org/mediagoblin/lib/python3.7/site-packages/configobj-5.0.6-py3.7.egg/configobj.py",
line 386, in _fetch
configobj.MissingInterpolationOption: missing option "here" in
interpolation.