jupyter-server-proxy labextension creates an error in the console

[dfguerrerom]

Description

jupyter-server-proxy labextension creates an error in the console

Reproduce

Install voila and install jupyter-server-proxy, start a voila app and the console will prompt the following error:

I would like to know why does it happen? is it an error coming from that package itself? or is it coming from somewhere else?

Expected behavior

It shouldn't show any error

Context

• voila version : 0.5.7

• Operating System and version:

  Distributor ID: Ubuntu
  Description:    Ubuntu 22.04.5 LTS
  Release:    22.04
  Codename:   jammy

• Browser and version: Google Chrome Version 129.0.6668.89 (Official Build) (64-bit)

[martinRenou]

I would like to know why does it happen? is it an error coming from that package itself? or is it coming from somewhere else?

This is because the jupyter-server-proxy has a jupyterlab extension that adds buttons and features to the jupyterlab filebrowser.

On the other side, voila is a JupyterLab-like application that loads all jupyterlab extensions, even the one from jupyter-server-proxy, but that one cannot load because the filebrowser is missing.

It should not prevent Voila to run though.

[dfguerrerom]

do you think it's worth disabling this extension here? https://github.com/voila-dashboards/voila/blob/f1722f46811a244b138f08bf6af02647890a6afd/voila/utils.py#L119