The BaseNBExtensionApp class is gone so the check if we're in >=4.2 fails here: https://github.com/jupyter/dashboards/blob/master/jupyter_dashboards/extensionapp.py#L12. Probably need to use notebook.extensions.BaseExtensionApp instead. That or remove the quick-setup convenience step and have people write out the install/enable/disable/uninstall manually.
The BaseNBExtensionApp class is gone so the check if we're in >=4.2 fails here: https://github.com/jupyter/dashboards/blob/master/jupyter_dashboards/extensionapp.py#L12. Probably need to use notebook.extensions.BaseExtensionApp instead. That or remove the quick-setup convenience step and have people write out the install/enable/disable/uninstall manually.
https://github.com/jupyter/notebook/blob/master/notebook/extensions.py#L52
Ref: https://github.com/jupyter/notebook/issues/2150