Error message in the web console: 

"This key is not authorized for use on this domain, if you are the key owner please login to console.temasys.io to manage domains for your key.
Please visit support.temasys.io for further assistance."



API error:

{"success":false,"info":"This key is not authorized for use on this domain, if you are the key owner please login to console.temasys.io to manage domains for your key. 

Please visit support.temasys.io for further assistance.","error":403}



Fix: 


Check your Temasys console account if the URL from which you are trying to access the app is defined under CORS URL. Please make sure that the domain is defined for the key you are using.


Here is a sample screenshot of CORS configuration for the app to be able to run on codepen.io and localhost. Please note that CORS is configured by default to run on all sub-domains.