go.Treemap does not render

Whilst I can produce the chart using px, I could not do the same using graph_obj, it just didn’t render the chart for me.

Below is my simple code.
If I replace parents = [’’]*len(consumer_tier), it would work, however it’s not my desired output. Anyone could help me with please? Thanks

go.Figure(
    go.Treemap(
        branchvalues='total',
        parents=consumer_tier['sales_tier'],
        labels=consumer_tier['visit_tier'],
        values=consumer_tier['spending_total']
    )
)