Plone5.2.1 on start: ValueError: Unknown level: 'error'

did anybody had this error and know what that might be?

  File "/usr/local/plone-5.2/buildout-cache/eggs/Zope-4.1.3-py3.7.egg/Zope2/Startup/serve.py", line 255, in <module>                                                                         
    sys.exit(main() or 0)
  File "/usr/local/plone-5.2/buildout-cache/eggs/Zope-4.1.3-py3.7.egg/Zope2/Startup/serve.py", line 251, in main                                                                             
    return command.run()
  File "/usr/local/plone-5.2/buildout-cache/eggs/Zope-4.1.3-py3.7.egg/Zope2/Startup/serve.py", line 180, in run                                                                              
    setup_logging(log_fn, global_conf=vars)
  File "/usr/local/plone-5.2/buildout-cache/eggs/Zope-4.1.3-py3.7.egg/Zope2/Startup/serve.py", line 79, in setup_logging                                                                     
    config_file, full_global_conf, disable_existing_loggers=False)
  File "/usr/lib/python3.7/logging/config.py", line 79, in fileConfig
    handlers = _install_handlers(cp, formatters)
  File "/usr/lib/python3.7/logging/config.py", line 148, in _install_handlers
    h.setLevel(level)
  File "/usr/lib/python3.7/logging/__init__.py", line 867, in setLevel
    self.level = _checkLevel(level)
  File "/usr/lib/python3.7/logging/__init__.py", line 192, in _checkLevel
    raise ValueError("Unknown level: %r" % level)
ValueError: Unknown level: 'error'

Wrong error level / typo in error spec somewhere in config?

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