Keep getting "Error displaying widget" with jupyter lab 2.12 + ipyvolume 0.5.2

[arkanoid87]

• [X] browser cache cleared
• [X] ipywidgets works
• [x] pythreejs works
• [X] jupyter lab build completed after "jupyter labextension update --all"
• [X] ipyvolume extension enabled

browser console Error: Module ipyvolume, semver range ~0.5.2 is not registered as a widget module

$ python --version Python 3.7.6

$ node --version v13.13.0

$ jupyter lab --version 2.1.2

$ conda list ipyvolume

# packages in environment at /opt/conda:
#
# Name                    Version                   Build  Channel
ipyvolume                 0.5.2                    py37_0    conda-forge

$ conda list ipywidgets

# packages in environment at /opt/conda:
#
# Name                    Version                   Build  Channel
ipywidgets                7.5.1                      py_0    conda-forge

$ conda list pythreejs

# packages in environment at /opt/conda:
#
# Name                    Version                   Build  Channel
pythreejs                 2.2.0              pyh8c360ce_0    conda-forge

$ jupyter labextension list

Known labextensions:
   app dir: /opt/conda/share/jupyter/lab
        @jupyter-widgets/jupyterlab-manager v2.0.0  enabled  OK
        @jupyterlab/hub-extension v2.1.2 disabled OK
        @pyviz/jupyterlab_pyviz v1.0.4  enabled  OK
        bqplot v0.5.16  enabled  OK
        ipyvolume v0.5.2  enabled  OK
        jupyter-leaflet v0.13.2  enabled  OK
        jupyter-matplotlib v0.7.3  enabled  OK
        jupyter-threejs v2.2.0  enabled  OK
        jupyter-vue v1.4.0  enabled  OK
        jupyterlab-datawidgets v6.3.0  enabled  OK
        jupyterlab_bokeh v1.0.0  enabled   X

$ conda info

     active environment : base
    active env location : /opt/conda
            shell level : 1
       user config file : /home/jovyan/.condarc
 populated config files : /opt/conda/.condarc
                          /home/jovyan/.condarc
          conda version : 4.8.4
    conda-build version : not installed
         python version : 3.7.6.final.0
       virtual packages : __glibc=2.27
       base environment : /opt/conda  (writable)
           channel URLs : https://conda.anaconda.org/conda-forge/linux-64
                          https://conda.anaconda.org/conda-forge/noarch
                          https://repo.anaconda.com/pkgs/main/linux-64
                          https://repo.anaconda.com/pkgs/main/noarch
                          https://repo.anaconda.com/pkgs/r/linux-64
                          https://repo.anaconda.com/pkgs/r/noarch
          package cache : /opt/conda/pkgs
                          /home/jovyan/.conda/pkgs
       envs directories : /opt/conda/envs
                          /home/jovyan/.conda/envs
               platform : linux-64
             user-agent : conda/4.8.4 requests/2.23.0 CPython/3.7.6 Linux/4.15.0-106-generic ubuntu/18.04.4 glibc/2.27
                UID:GID : 1000:100
             netrc file : None
           offline mode : False

[pratulyab]

I was able to resolve this for jupyterlab 2.1.4 (python3.6.9) by installing:

• latest ipyvolume release (assuming latest ipyvolume labextension)

  • pip install ipyvolume==0.6.0a6 (pre-release)

• bqplot

  • pip install bqplot
  • jupyter labextension install bqplot

[mwidjaja1]

+1 for @pratulyab. Installing bqplot worked for me. Is it worth it for someone and/or me to add that to the Installation Documentation, which doesn't mention bqplot currently?