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Where is my mistake

Hi,
So I’m using below code:

app.layout = html.Div(children=[
dcc.Markdown(“ver. {}”.format(dfConfirmedGlobe.columns[-1]), style={‘textAlign’: ‘right’}),
dcc.Graph(
id = “mainMap”,
figure = mainMap_builder(),
config={
‘displayModeBar’: False
},
style = {
‘height’: ‘90vh’,
‘width’: ‘50%’,
‘display’: ‘inline-block’,
‘margin’: 0,
‘padding’: 0,
‘line-style’: ‘none’
}
),
html. Div([
dcc.Graph(
id = “map2”,
figure = mainMap_builder(),
config={
‘displayModeBar’: False
}
),
dcc.Graph(
id = “map3”,
figure = mainMap_builder(),
config={
‘displayModeBar’: False
}
)
],style = {
‘display’: ‘inline-block’,
‘height’: ‘45vh’,
‘width’: ‘50%’,
‘float’: ‘right’,
‘margin’: 0,
‘padding’: 0,
‘line-style’: ‘none’
}
)]
)

It generates the page with black bar at the bottom left. I don’t know how to avoid that. Please help me.