holoview.Div() doesn't work

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ALL software version info

(this library, plus any other relevant software, e.g. bokeh, python, notebook, OS, browser, etc)

Description of expected behavior and the observed behavior

When I ran the example of holoviews.Div given in the official document using jupyter notebook, it didn’t work and there was no distinction in the title level.

Complete, minimal, self-contained example code that reproduces the issue

hv.Div("""
<h1>Div</h1>
<h3>A simple demo</h2>

<figure>
<img src="https://assets.holoviews.org/logo/holoviews_color_icon_500x500.png" height='200' width='200'>
<figcaption><b>Fig 1:</b> This is a figure caption with $LaTeX$</figcaption>
""")

# code goes here between backticks

Stack traceback and/or browser JavaScript console output

Screenshots or screencasts of the bug in action