Looks like your credentials are incorrect. Looking to the 401 unauthorized http code.
What is the authentication method you are using?
You can either disable the negotiation using the request parameter “spnego=disabled” (see: https://launchpad.support.sap.com/#/notes/0002462330), or you need to configure your browser for it: E.g. https://docs.spring.io/spring-security-kerberos/docs/current/reference/html/browserspnegoconfig.html