mode='jupyterlab' not work, but 'inline' works.

[GF-Huang]

app.run_server(mode='jupyterlab') nothing happen.

app.run_server(mode='inline') show figure correct.

[reszelaz]

Hi,

With dash=2.6.1 and jupyter_dash 0.4.2 I was able to run the https://github.com/plotly/jupyter-dash/blob/master/notebooks/getting_started.ipynb notebook in the jupyterlab mode, which in the past did not work for me.