[dbquery] 500 error on execute query

{"status": -1, "message": "There was an error with your query.", "errors": {"query": ["This field is required."]}}

[rdbms]
  [[databases]]
    # mysql or postgresql
    [[[mydb]]]
    nice_name=mysql
    engine=mysql
    ##host=localhost
    ## port=
    user=root
    password=root
    ## options={}