Unable to access ipympl from JupyterLab due to Error displaying widget: model not found

Tái hiện ví dụ được báo cáo bắt đầu bằng %matplotlib widget trong JupyterLab 3.6.3, sử dụng các phiên bản ipympl, ipywidgets và các gói Jupyter được liệt kê. Trước tiên, hãy kiểm tra tích hợp widget của JupyterLab và các tiện ích mở rộng đã bật jupyter-matplotlib và @jupyter-widgets/jupyterlab-manager. Được xem là hoàn tất khi đồ thị sin được hiển thị dưới dạng widget tương tác mà không có lỗi “model not found”.

Describe the issue

I am running an example code to access ipympl from Jupyter Lab on GCP/Linux.

%matplotlib widget
import matplotlib.pyplot as plt
import numpy as np
import sys
"ipympl" in sys.modules
True

# Testing matplotlib interactions with a simple plot
fig = plt.figure()
plt.plot(np.sin(np.linspace(0, 20, 100)));

Error displaying widget: model not found

Versions

Paste the command output here.

3.8.10 (default, Mar 13 2023, 10:26:41) 
[GCC 9.4.0]
ipympl version: 0.9.3
Selected Jupyter core packages...
IPython          : 8.12.0
ipykernel        : 6.13.0
ipywidgets       : 8.0.6
jupyter_client   : 8.2.0
jupyter_core     : 5.3.0
jupyter_server   : 2.5.0
jupyterlab       : 3.6.3
nbclient         : 0.7.4
nbconvert        : 7.3.1
nbformat         : 5.8.0
notebook         : 6.5.4
qtconsole        : not installed
traitlets        : 5.9.0
Known nbextensions:
  config dir: /usr/local/etc/jupyter/nbconfig
    notebook section
      jupyter-matplotlib/extension  enabled 
      - Validating: OK
      jupyter_resource_usage/main  enabled 
      - Validating: OK
      nbdime/index  enabled 
      - Validating: OK
      jupyter-js-widgets/extension  enabled 
      - Validating: OK
    tree section
      jupyter_server_proxy/tree  enabled 
      - Validating: OK
JupyterLab v3.6.3
/usr/local/share/jupyter/labextensions
        jupyterlab_pygments v0.2.2 enabled OK (python, jupyterlab_pygments)
        dask-labextension v6.1.0 enabled OK (python, dask_labextension)
        nbdime-jupyterlab v2.2.0 enabled OK
        jupyter-matplotlib v0.11.3 enabled OK
        jupyterlab-nvdashboard v0.8.0 enabled OK (python, jupyterlab_nvdashboard)
        @jupyterlab/git v0.41.0 enabled OK (python, jupyterlab-git)
        @jupyter-widgets/jupyterlab-manager v5.0.7 enabled OK (python, jupyterlab_widgets)
        @jupyterhub/jupyter-server-proxy v4.0.0 enabled OK
        @jupyter-server/resource-usage v0.7.2 enabled OK (python, jupyter-resource-usage)
        @jupyter-lsp/jupyterlab-lsp v4.1.0 enabled OK (python, jupyterlab-lsp)
        @elyra/code-snippet-extension v3.15.0 enabled OK
        @elyra/script-debugger-extension v3.15.0 enabled OK
        @elyra/python-editor-extension v3.15.0 enabled OK
        @elyra/metadata-extension v3.15.0 enabled OK
        @elyra/pipeline-editor-extension v3.15.0 enabled OK
        @elyra/code-viewer-extension v3.15.0 enabled OK
        @elyra/theme-extension v3.15.0 enabled OK
        @elyra/r-editor-extension v3.15.0 enabled OK
        @elyra/scala-editor-extension v3.15.0 enabled OK

Other labextensions (built into JupyterLab)
   app dir: /usr/local/share/jupyter/lab


Disabled extensions:
    @jupyterlab/launcher-extension (all plugins)