Unable to connect to google map api via integration

I am trying to connect maps.googleapis.com/.../json with my key and I am getting below error: The external system could not be found error-result-guidance Appian could not find a DNS address for https://maps.googleapis.com Next Steps Make sure that the URL host is correct Try to open the URL in a web browser to verify that the value is correct Ask a network administrator to investigate DNS problems.

Any pointers would be greatly appreciated.