Unable to open the requested feature. Error Code:-202

When i click Curve fitting toolbox or other App, it shows that

Unable to open the requested feature.

Check your internet connection and proxy settings in MATLAB Web preferences and then try starting the feature again.

Detailed information:

Error code: -202

Error message: ERR_CERT_AUTHORITY_INVALID

[Walter Roberson]

Possibly relevant:

https://www.mathworks.com/matlabcentral/answers/1897980-why-do-i-receive-error-code-202#answer_1153825

https://www.mathworks.com/matlabcentral/answers/2013272-why-do-i-receive-an-error-occurred-error-202-when-updating-matlab

[Walter Roberson]

Are you using a license server ?

If so then the access to the license server is being rejected on the grounds that the certificate for the domain is invalid (for example if the certificate has expired, or if the name you are using to access the host was not added to the certificate list as being a valid alternative name for the host.)