– Tobias Schwarz Commented Jan 26 at 11:53 Now I realize that both equally my schema and yours are right since the URL arrives from localhost; This is exactly why Google shows an error. I've extra a comment for anyone who may possibly encounter a similar problem Later on. Many thanks https://andersonvlwkt.answerblogs.com/32104749/not-known-facts-about-json-schema-custom-message