Empty output (no graph) in Jupyter Lab

[jjphung]

When running the sample:

from backtrader_bokeh import bt as bt_bokeh
plot = bt_bokeh.Bokeh()
cerebro.plot(plot, iplot=False)

there is nothing displayed in the Jupyter Lab cell output except: " BokehJS 2.4.3 successfully loaded."

Versions of packages:

• backtrader-bokeh==0.8.9
• bokeh==2.4.3
• jupyter-bokeh==3.0.7
• jupyter-lab: 3.4.8

Is there something else I may be missing?