Starting jupyterlab in a jupyterhub environment opens in an blank browser

[arinbasu]

Hi All,
I use Jupyterlab in a jupyterhub environment. The jupyterhub environment itself was installe using ansible. Since yesterday after installation of bokeh and ipywidgets Jupyter lab extensions (I did not upgrade jupyterhub db after installation), I cannot open jupyter lab in a browser at all.
The versions:
Jupyter lab: 1.0.4
Jupyter notebook: 6.0.0
I tried the solutions offered in an earlier similar thread but nothng seems to work.
I deleted the jupyterhub.sqlite database and then rebuilt it, but it did not change anything.
Would greatly appreciate your guidance how to solve this issue.
Best,
Arindam Basu

[jasongrout]

See also the discourse post that contains some more error logs: https://discourse.jupyter.org/t/blank-browser-screen-when-i-start-jupyter-lab-on-jupyterhub-what-shall-i-do/1824/4

This sounds like it may be a jupyterhub configuration issue?

[arinbasu]

Thanks a million, @jasongrout !
Here is more information on the issue from my browser console (large output hence I have posted a link to it):
https://arinbasu.github.io/life_is_error/jupyterlab.txt

[carluri]

I have exactly the same problem.

I installed jupyterhub and jupyterhub using the ansible script and instructions provided in this repository
https://github.com/jupyterhub/jupyterhub-deploy-teaching

For now, I had to go back to jupyterlab 0.35.6. Once I update to the jupytelab 1.0.X I get the blank screen.

[jasongrout]

FYI, over in #7053, we solved a blank screen issue in 1.0.6 by updating jinja.

[sorenwacker]

Same problem with

jupyterlab                      1.2.1                        
jupyterlab-dash                 0.1.0a2                      
jupyterlab-server               1.0.6 

[highwindmx]

jupyterlab: 1.0.7

Firefox shows error:
SyntaxError: JSON.parse: expected property name or '}' at line 2 column 6 of the JSON data pageconfig.js:44:34