Error when trying to use: "component prop type `start` is invalid"

[Valentin Mihov]

I installed the plugin on a barebone Dash app and I am getting an error when trying to run this layout:

app.layout = dfx.Grid(id='grid', fluid=True, children=[
    dfx.Row(children=[
        dfx.Col(xs=12, lg=3, children=[
            html.H1('Title')
        ])
    ]),
    dfx.Row(id='row', children=[
        dfx.Col(id='col', xs=6, lg=2, children=html.Div('Hello, World!')),
        dfx.Col(xs=6, lg=2, children=html.Div('Hello, World!'))
    ])
])

The error:

function Row() {
        _classCallCheck(this, Row);

        return _possibleConstructorReturn(this, (Row.__proto__ || Object.getPrototypeOf(Row)).apply(this, arguments));
    }: component prop type `start` is invalid; it must be a function, usually from React.PropTypes.

Any idea what could be the problem? Here are my dependencies:

dash==0.43.0
dash-daq==0.1.0
clickhouse-driver==0.0.15
pandas==0.24.2
gunicorn==19.7.1
pandas-compat==0.1.1
lz4==2.1.1
clickhouse-cityhash==1.0.2.2
dash-flexbox-grid==0.2.0

[Sergei Pikhovkin]

I fixed it. Please update

[Valentin Mihov]

It works with version 0.2.1. Thanks!