Show layout errors in devtools, not just "Error loading layout"

When using pd.Series with missing values encode as pandas.NA everything run fine however the web page display an error as html code (see img bellow).

I am not sure if this needs a fix I guess u are still waiting to implement support for pandas.NA but it would be helpful to get a python error on execution (which btw is already the case when invoking plotly.Figure show method).

Code to reproduce the bug

import pandas as pd

from plotly.express import line

from dash import Dash, html, dcc

df = pd.DataFrame([[1], [1, 4]], columns=['x', 'y'])
df['y'] = df.y.astype('UInt32')

fig = line(df, x='x',y='y')
fig = dcc.Graph(
    figure= fig
)
app = Dash(__name__)
app.layout = html.Div(children=fig)
app.run(debug=True)

My env

dash                               2.5.1
dash-core-components               2.0.0
dash-html-components               2.0.0
dash-table                         5.0.0

Run the supplied pandas.NA reproduction with app.run(debug=True), then trace how the layout containing dcc.Graph and html.Div reports errors. Compare this with the Plotly Figure.show behavior mentioned in the issue. Done means the underlying layout error is available in devtools instead of only showing “Error loading layout”.