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Jupyter cannot show Mapbox (Black Map)

I have a problem to show map in Jupyter.

I check if token is valid or not and it shows a map.

https://api.mapbox.com/v4/mapbox.satellite/page.html?access_token=my-token-api

Blank Map is appeared on the screen. How can I fix it?

Here is my code snippet.

import plotly.graph_objects as go    
import plotly.io as pio              
import plotly.express as px
import plotly

access_token = 'my-token-api'
px.set_mapbox_access_token(access_token)

fig = px.density_mapbox(corona_df, 
                        lat='Lat', 
                        lon='Long', 
                        hover_name='Country', 
                        hover_data = ['Total_Corfirmed', 'Total_Death', 'Total_Recovered'], 
                        animation_frame="Day_Date", 
                        color_continuous_scale='Rainbow', 
                        radius=7, zoom=0, height=700)

fig.update_layout(title='Worldwide Corona Virus Cases Time Lapse - Confirmed, Deaths, Recovered'
                  ,font=dict(family="Courier New, monospace",size=18,color="#7f7f7f"))

fig.update_layout(mapbox_style="dark", mapbox_accesstoken = access_token)
fig.update_layout(margin={"r":0,"t":0,"l":0,"b":0})
fig.show()