Fails to display widget in development installation

[smahn9123]

Hello, I followed the steps provided for dev installation, bud widget fails in display

$ git clone https://github.com/QuantStack/ipytree.git
$ cd ipytree
$ pip install -e .
$ jupyter nbextension install --py --symlink --sys-prefix ipytree
$ jupyter nbextension enable --py --sys-prefix ipytree

The error log says:

Failed to load model class 'TreeModel' from module 'ipytree'
Error: No version of module ipytree is registered

Could you have any idea what the problem is?
I am on Windows 10, and have use Anacoda to set up the env. Using jupyter lab.

[martinRenou]

Using jupyter lab

If you are using JupyterLab, you don't need to run any nbextension command.

Instead you will need to run jupyter labextension develop . --overwrite from the root of the ipytree repo.