Request not valid

Exception: the request you have submitted is not valid. Mars server task finished in error - Retry: Connector::socketIo(Connector[marsmvr-0002:9702]) only -1 byte(s) read intead of 1 (Connection reset by peer) [mars] - Error code is -7776 - Mars server task finished in error - Assertion failed: handle_[n] != nullptr in dataHandle, line 76 of /home/cds/git/mars-server/mars-server/src/dhslib/DSRetrieve.cc [mars] - Error code is -2 - Request failed - Some errors reported.

  c = cdsapi.Client()
  c.retrieve(
    'reanalysis-era5-single-levels',
    {
      'expver': '0005',
      'format': 'grib',
      'variable': [
            '100m_u_component_of_wind', '100m_v_component_of_wind'
      ],
      'year': [
        '2015', '2016', '2017',
        '2018', '2019'
      ],
      'month': [
        '01', '02', '03',
        '04', '05', '06',
        '07', '08', '09',
        '10', '11', '12'
      ],
      'day': [
        '01', '02', '03',
        '04', '05', '06',
        '07', '08', '09',
        '10', '11', '12',
        '13', '14', '15',
        '16', '17', '18',
        '19', '20', '21',
        '22', '23', '24',
        '25', '26', '27',
        '28', '29', '30'
      ],
      'time': [
        '00:00', '01:00', '02:00',
        '03:00', '04:00', '05:00',
        '06:00', '07:00', '08:00',
        '09:00', '10:00', '11:00',
        '12:00', '13:00', '14:00',
        '15:00', '16:00', '17:00',
        '18:00', '19:00', '20:00',
        '21:00', '22:00', '23:00'
      ],
      'area': [float(lat)+0.125, float(lon)-0.125, float(lat)-0.125, float(lon)+0.125], 
      'grid': ['0.25', '0.25']
    },
    '/app/era5_data/download_5years_2vars.grib'
  )