ipywidget error in jupyterlab notebook: "Could not find model"

Hello, I work on the development of a Python library that uses an ipywidget map. In the standard Jupyter Notebook environment, our map widget works great:

I am attempting to see if the map widget and our API will work just the same in JupyterLab notebooks. I run the following commands in either OSX or Windows for setup:

conda create --name new_jlab_env
source activate new_jlab_env
conda install -c conda-forge jupyterlab
jupyter labextension install @jupyter-widgets/jupyterlab-manager
conda install -c esri arcgis
jupyter lab

However, I get the following error when trying to use the map widget in jupyterlab notebooks:

From my understanding, in theory most ipywidgets should work in jupyterlab by installing jupyterlab-manager like I did, correct? Am I missing a step, or is this a known issue like #1664 and #1684? Thanks for your help!

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Here is a screenshot of my browser console during the widget drawing failure, here is my conda environment

[maartenbreddels]

Let me add to this that is will be transparent to users in the future. A pip install of a package can enable it both in the jupyter notebook and jupyter lab, we’re not there yet, but close!

[jasongrout]

Also please note that the JupyterLab extension api is still in flux until 1.0, so you may need to update jupyterlab extensions to keep up with beta releases. We try to shield you from this in ipywidgets, so hopefully things will be fairly stable, but the JupyterLab “beta” indicates that the plugin api is not stable.