When using the sunburst class in PX, providing a parent value that is missing will cause plotly to neither throw an error nor display a graph. Quite difficult to troubleshoot when the data matrix is large.

Example, with one additional character added to a parent taken from https://plotly.com/python/sunburst-charts/:

import plotly.express as px
data = dict(
    character=["Eve", "Cain", "Seth", "Enos", "Noam", "Abel", "Awan", "Enoch", "Azura"],
    parent=["", "Evie", "Eve", "Seth", "Seth", "Eve", "Eve", "Awan", "Eve" ],
    value=[10, 14, 12, 10, 2, 6, 6, 4, 4])

fig =px.sunburst(
    data,
    names='character',
    parents='parent',
    values='value',
)
a=fig.show()

Note the deliberate typo of "Evie" instead of "Eve" in the parent=[] list. This causes a totally silent failure, as far as I can see. No exception is raised, no error output is visible in the HTML source, zip, zilch, nada.

Using plotly v0.8.0 installed via pip on python 3.8.3 Win64.