The fonts or icons from another domain are not loaded in WordPress on Plesk: blocked by CORS policy

Symptoms

• Some of icons, fonts or images failed to load on website example.com .
• External domain example2.com is the source of those objects
• The following errors could be found under Console tab while inspecting loading of website page using developer tools like Firebug (press F12 key in Firefox or Chrome):

  CONFIG_TEXT: Access to Font at 'https://example2.com/fonts/glyphicons-halflings-regular.woff2' from origin 'https://example2.com' has been blocked by CORS policy: No 'Access-Control -Allow-Origin 'header is present on the requested resource. Origin 'https://example2.com' is therefore not allowed access.

Cause

CORS (cross-origin resource sharing) is not configured on the external source domain example2.com

Resolution

Configure cross-origin resource sharing (CORS) on external source domain with help of the article How to set up CORS (cross-origin resource sharing) in Plesk?

Additional Information

Is it possible to enable CORS (cross-origin resource sharing) on Plesk for Windows?