+CONSOLE WARNING: Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check http://xhr.spec.whatwg.org/.
CONSOLE ERROR: XMLHttpRequest cannot load http://127.0.0.1:8000/xmlhttprequest/resources/access-control-allow-lists.php?origin=%22*%22. The 'Access-Control-Allow-Origin' header contains the invalid value '"*"'. Origin 'http://localhost:8000' is therefore not allowed access.