Why do I get the error "There was an issue communicating to the MATLAB compute resource" in a self-paced online training?

I encounter the following error message while doing self-paced online training (e.g. MATLAB Onramp):

Worker not responsive
There was an issue communicating to the MATLAB compute resource.

Answer 1

[MathWorks Support Team]

Please try out the following:

(1) Refresh browser cache. For instructions for refreshing browser cache for different Web Browsers, please refer to the following MATLAB Answers post:https://www.mathworks.com/matlabcentral/answers/376183-why-do-i-get-an-error-message-when-trying-to-access-my-self-paced-online-training

(2) Try a different browser. This issue has been reported in strong correlation with Chrome and Edge. Please try another (non-Chromium based) browser like Firefox or Safari.

(3) Check that your system settings meet the browser requirements of the self-paced training. For the browser requirements for online courses, please refer to the Browser Requirements page: https://www.mathworks.com/support/requirements/browser-requirements.html

(4) Switch to another network. If you were taking the course using your home network, try using the campus/company network (and vice versa) or use VPN.

(5) Check your firewall settings and security policy with the help of your IT team. Make sure that post request to our URL aren't blocked.

(6) Make sure that your approach can run efficiently and that outputs are not too large. Note that the assessment times out after a certain amount of time. If an approach takes more time than the assessment time, then an error would be generated. It has also been reported that large outputs can cause issues during submission.

(7) If you still encounter the error prompt, try to click on "Wait" instead of "Try again". Then, navigate to some other content. Finally, navigate back to the same content. This would usually load up the content that one wasn't previously able to load up.

In case the above does not help you resolve the issue, contact MathWorks Technical Support and provide the following information:

1. When is the issue happening? Is it only in this specific section of the course?
2. Does the issue consistently occur in the same section?
3. Are you losing your progress in the section where you are getting the message - "There was an issue communicating to the MATLAB compute resource."?
4. Which browser are you using? Please provide the version number.