Google structured data error: “All values provided for http://www.example.com/ must have the same domain.”

Question

I want to add Corporate Contacts in Google Search. I test the following code in Google\'s Structured Data Testing Tool, but it threw this error:

Answer 1

This is likely a bug in Google’s Structured Data Testing Tool.

(When removing the contactPoint property, the tool no longer reports an error, although the snippet still contains the same url value.)

See DieterDP’s answer in a related question.