JupyterLab web browser tab showing white screen only

[fkromer]

After installing and enabling jupyterlab-dash in a JupyterLab dev setup and running JupyterLab with jupyter lab the JupyterLab tab in the web browser is showing a white screen without any content.

My configuration:

>jupyter labextension list
JupyterLab v1.0.5
Known labextensions:
   app dir: <SOME-VIRTUAL-ENV>\share\jupyter\lab
        @jupyter-widgets/jupyterlab-manager v1.0.2 enabled  ok
        @jupyterlab/plotly-extension v1.0.0 enabled  ok
        jupyterlab-chart-editor v1.2.0 enabled  ok
        jupyterlab-dash v0.1.0-alpha.3 enabled  ok
        jupyterlab-plotly v1.1.0 enabled  ok
        plotlywidget v1.1.0 enabled  ok

Running JupyterLab with the pinned dependencies via jupyter lab --core-mode works as usual.

[mazzma12]

same here with :

❯ jupyter labextension list
JupyterLab v1.1.3
Known labextensions:
   app dir: /home/matthieu/.pyenv/versions/anaconda3-2018.12/share/jupyter/lab
        @jupyter-widgets/jupyterlab-manager v1.0.2  enabled  OK
        @jupyterlab/dataregistry-extension v2.2.2  enabled  OK
        @jupyterlab/geojson-extension v0.18.1  enabled  OK
        @jupyterlab/git v0.8.2  enabled  OK
        @jupyterlab/plotly-extension v1.0.0  enabled  OK
        @jupyterlab/toc v1.0.1  enabled  OK
        @ryantam626/jupyterlab_code_formatter v0.5.1  enabled  OK
        ipyvolume v0.5.2  enabled  OK
        jupyter-matplotlib v0.4.2  enabled  OK
        jupyterlab-dash v0.1.0-alpha.3  enabled  OK
        jupyterlab-plotly v1.1.0  enabled  OK
        plotlywidget v1.1.0  enabled  OK

[sorenwacker]

I experienced this after:

 conda install -c conda-forge jupyterlab-plotly-extension

JupyterLab v1.2.3
Known labextensions:
app dir: /home/swacker/miniconda3/envs/py3/share/jupyter/lab
@jupyterlab/plotly-extension v1.0.0 enabled OK
jupyter-threejs v2.1.1 enabled OK
jupyterlab-datawidgets v6.2.0 enabled OK
plotlywidget v1.2.0 enabled OK