What does the render with panel jupyter lab button do?

I’m not sure what this button does and how to use it

It should let you preview your notebook as a Panel in JupyterLab:

Looks like the serverextension that is responsible for running the endpoint isn’t running on your end though :confused:

Could you paste the output of jupyter serverextension list?

❯ jupyter serverextension list
config dir: /Users/ray/miniconda3/envs/main/etc/jupyter
    dask_labextension  enabled
    - Validating...
      dask_labextension 5.1.0 OK
    jupyter_server_proxy  enabled
    - Validating...
      jupyter_server_proxy  OK
    jupyterlab  enabled
    - Validating...
      jupyterlab 3.2.2 OK
    jupyterlab_code_formatter  enabled
    - Validating...
      jupyterlab_code_formatter 1.4.10 OK
    jupyterlab_git  enabled
    - Validating...
      jupyterlab_git 0.33.0 OK
    nbdime  enabled
    - Validating...
      nbdime 3.1.1 OK
    xarray_leaflet  enabled
    - Validating...
      xarray_leaflet 0.1.15 OK

I also have this problem:

Config option `kernel_spec_manager_class` not recognized by `ListServerExtensionsApp`.
config dir: C:\Users\shh\.jupyter
    dask_labextension enabled
    - Validating...
      dask_labextension 5.1.0 ok
config dir: C:\Users\shh\miniconda3\etc\jupyter
    dask_labextension enabled
    - Validating...
      dask_labextension 5.1.0 ok
    jupyter_server_proxy enabled
    - Validating...
      jupyter_server_proxy  ok
    jupyterlab enabled
    - Validating...
      jupyterlab 3.1.17 ok
    nb_conda enabled
    - Validating...
      nb_conda 2.2.1 o