I am trying to run some of the examples of floweaver in a jupyter notebook. However, I keep getting this issue

Failed to load model class 'SankeyModel' from module 'jupyter-sankey-widget'
Error: No version of module jupyter-sankey-widget is registered
    at f.loadClass (http://localhost:8888/lab/extensions/@jupyter-widgets/jupyterlab-manager/static/134.a63a8d293fb35a52dc25.js?v=a63a8d293fb35a52dc25:1:74936)
    at f.loadModelClass (http://localhost:8888/lab/extensions/@jupyter-widgets/jupyterlab-manager/static/336.ebc7a55ea1768712771f.js?v=ebc7a55ea1768712771f:1:10729)
    at f._make_model (http://localhost:8888/lab/extensions/@jupyter-widgets/jupyterlab-manager/static/336.ebc7a55ea1768712771f.js?v=ebc7a55ea1768712771f:1:7517)
    at f.new_model (http://localhost:8888/lab/extensions/@jupyter-widgets/jupyterlab-manager/static/336.ebc7a55ea1768712771f.js?v=ebc7a55ea1768712771f:1:5137)
    at f.handle_comm_open (http://localhost:8888/lab/extensions/@jupyter-widgets/jupyterlab-manager/static/336.ebc7a55ea1768712771f.js?v=ebc7a55ea1768712771f:1:3894)
    at _handleCommOpen (http://localhost:8888/lab/extensions/@jupyter-widgets/jupyterlab-manager/static/134.a63a8d293fb35a52dc25.js?v=a63a8d293fb35a52dc25:1:73473)
    at v._handleCommOpen (http://localhost:8888/static/notebook/3676.bundle.js:1:30808)
    at async v._handleMessage (http://localhost:8888/static/notebook/3676.bundle.js:1:32702)

I installed via Conda and enabled the extensions. Also downgrading packages as recommended in this link did not work.