CONSOLE ERROR: XMLHttpRequest cannot load http://127.0.0.1:8000/xmlhttprequest/resources/access-control-allow-lists.php?origin=*%20*. The 'Access-Control-Allow-Origin' header contains multiple values '* *', but only one is allowed. Origin 'http://localhost:8000' is therefore not allowed access. -------- Frame: '-->' -------- Check that exact matching is used when comparing a request's originating url and the value provided by Access-Control-Allow-Origin. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". Should disallow origin: '* *' PASS xhr.send(null) threw exception NetworkError: A network error occurred.. PASS successfullyParsed is true TEST COMPLETE