Browser error: "Failed to load model class 'LeafletMapModel' from module 'jupyter-leaflet'"

[chippey]

Cross reporting from opengeos/leafmap#1200:

Environment Information

• leafmap version: 0.52.0
• Python version: 3.13.5
• Operating System: Rocky Linux 9.6
• JupyterLab: 4.4.6
• JupyterHub: 5.3.0

Description

Trying to load a geotiff via add_raster in a JupyterLab on a JupyterHub produces a javascript error in the browser: Failed to load model class 'LeafletMapModel' from module 'jupyter-leaflet', and no map interface is created.

What I Did

Some information redacted below:

import leafmap
m = leafmap.Map()

m.add_raster("/snipped_path/snipped_filename.tif")
m

This still occurs with a fresh conda env, with only leafmap (and its pulled in dependencies) installed.

[giswqs]

Try creating a fresh conda env and install ipyleaflet only, then run the following to see if you get the same error.

import ipyleaflet
m = ipyleaflet.Map()
m

[giswqs]

Run the following commands to create a new conda env and install packages.

conda create -n test python=3.12
conda activate test
conda install -c conda-forge ipyleaflet jupyterlab
jupyter lab

import ipyleaflet
m = ipyleaflet.Map()
m

[chippey]

Try creating a fresh conda env and install ipyleaflet only, then run the following to see if you get the same error.

import ipyleaflet
m = ipyleaflet.Map()
m

Still getting the same error with a fresh conda env with only ipyleaflet in it.

conda create -n test python=3.12
conda activate test
conda install -c conda-forge ipyleaflet jupyterlab
jupyter lab

This is part of a managed JupyterHub, so the JupyterLab is coming from that and creating a new jupyterlab in a user conda env wouldn't be exposed (I don't think, at least). I'll try another fresh conda env to use python 3.12, as the system default is 3.13.

[giswqs]

Managed JupyterHub needs more work, see #1034 (comment)

[chippey]

Got it - somehow I missed that issue when searching for existing reports. I'm happy to test out any patches for this.

[geodig]

Is there any concrete solution to this problem? I have the same issue