问题 I am running jupyterlab within jupyterhub on kubernetes. I am trying to display widgets using e.g. from ipywidgets import interact @interact(x=(0, 100, 10)) def p(x=50): pass Instead of the intended interactive widget, the lab notebook prints: interactive(children=(IntSlider(value=50, description='x', step=10), Output()), _dom_classes=('widget-interact... On inspection of the javascript console: default.js:129 Error: Object 'jupyter.widget' not found in registry at default.js:1474 at new