The browser loads my css file rather than a web page

I have a problem in my web app. If user was logout & try signin again , browser load my css file not a web page!!!!! (web url http://localhost:8888/resources/html/css/mystyle.css) ! If try again - thats ok loads my web page. After logout again css file/// I use java, spring mvc, spring security.

 <link href="/resources/html/css/mystyle.css" rel="stylesheet">

In my AppConfig extends WebMvcConfigurerAdapter i use handler:

@Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/resources/**").addResourceLocations("/WEB-INF/resources/");
    }

And my login code:

<c:url value="/j_spring_security_check" var="loginUrl" />
    <form action="${loginUrl}" class="form-horizontal" method="post">

 http.formLogin()
                .loginPage("/")
                .loginProcessingUrl("/j_spring_security_check")
                .defaultSuccessUrl("/projects", false)
                .failureUrl("/hello/signINincorrect")
                .usernameParameter("j_username")
                .passwordParameter("j_password")