Here's my code. What am I doing wrong: sc = Sidecar(title='Trace') ht = widgets.HTML( value="Hello <b>World</b>", placeholder='Some HTML', description='Some HTML', ) with sc: display(ht) I have also tried: sc = Sidecar(title='Trace') with sc: display(HTML(functools.reduce(lambda x, y: x+y, c.htmlStream())