Cannot run Plotly in MATLAB

After the installation completed, I try to test Plotly by running the simple example below:

[X,Y,Z] = peaks;
contour(X,Y,Z,20);
fig2plotly()

But I get this error:

Error using urlreadwrite (line 54)
Could not POST to URL.

Error in urlread (line 36)
[s,status] = urlreadwrite(mfilename,catchErrors,url,varargin{:});

Error in makecall (line 27)
resp = urlread(url, โ€˜Postโ€™, payload);

Error in plotly (line 28)
response = makecall(args, origin, structargs);

Error in plotlyfig/plotly (line 432)
response = plotly(obj.data, args);

Error in fig2plotly (line 49)
p.plotly;

Can you please help?
Thanks!

I have the same problem! Can anyone help please?

I have the same problem! Can anyone help please?