Getting AttributeError: module 'plotly.validators.layout.mapbox.layer' has no attribute 'CoordinatesValidator'

I am using plotly 3.1 and am getting he below error: AttributeError: module 'plotly.validators.layout.mapbox.layer' has no attribute 'CoordinatesValidator' I read around tried with 3.4.2 and 4.1 versions - same error here is an example code i am using:

trace = go.Bar(
    x=cnt_users.year_month,
    y=cnt_users.num_users,
    marker=dict(
        colorscale = 'Picnic',
        reversescale = True
    ),
)
layout = go.Layout(
    title='Count of Unique Users per Month',
    font=dict(size=16)
)
data = [trace]
fig = go.Figure(data=data, layout=layout)
fig['layout'].update(height=500, width=1500)
py.iplot(fig, filename="TargetCount")

This was working for me 4 months ago but now i am getting an error

[nicolaskruchten]

I’ve just been able to replicate this with an open notebook after installing a different version of plotly while the kernel was running, and restarting the kernel resolved the issue, so this may be part of the solution for some folks.

[Tkumar21]

I am also getting same issue while using CX_Freeze for bundling ,otherwise it is working fine on my system. unable to trace what the issue. Do anyone have solution :

AttributeError: module ‘plotly.validators.layout.xaxis’ has no attribute ‘AnchorValidator’

AttributeError: module ‘plotly.validators.scatter’ has no attribute ‘LegendgroupValidator’