[Python] Getting error loading dependencies in chrome browser, when running plotly dash code

I am new to plotly dash and trying to run this googled code to understand the output. When i run the below code in windows cmd prompt, the execution returns the URL-- http://127.0.0.1:3003 On pasting the above in Chrome browser, error loading dependencies is displayed in the browser window. Please find below the code.

import dash
import dash_core_components as dcc
import dash_html_components as html
import plotly.graph_objs as go
import pandas as pd


df = pd.read_excel(
"https://github.com/chris1610/pbpython/blob/master/data/salesfunnel.xlsx?raw=True"
)

pv = pd.pivot_table(df, index=['Name'], columns=["Status"], values=['Quantity'], aggfunc=sum, fill_value=0)


trace1 = go.Bar(x=pv.index, y=pv[('Quantity', 'declined')], name='Declined')
trace2 = go.Bar(x=pv.index, y=pv[('Quantity', 'pending')], name='Pending')
trace3 = go.Bar(x=pv.index, y=pv[('Quantity', 'presented')], name='Presented')
trace4 = go.Bar(x=pv.index, y=pv[('Quantity', 'won')], name='Won')

app = dash.Dash()
app.layout = html.Div(children=[
html.H1(children='Sales Funnel Report'),
html.Div(children='''National Sales Funnel Report.'''),
dcc.Graph(
id='example-graph',
figure={
'data': [trace1, trace2, trace3, trace4],
'layout':
go.Layout(title='Order Status by Customer', barmode='stack')
})
])
app.scripts.config.serve_locally = True
app.css.config.serve_locally = True
if __name__ == '__main__':
app.run_server(port=3003)

if __name__ == '__main__':
app.run_server(debug=True)

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