Check the correct setting to hide login button

lms/templates/navigation/navbar-not-authenticated.html

@@ -49,7 +49,7 @@
 <ol class="right nav-courseware list-inline">
   <%block name="navigation_sign_in">
     <li class="item nav-courseware-01">
-      % if not settings.DISABLE_REGISTER_BUTTON and not combined_login_and_register:
+      % if not settings.FEATURES['DISABLE_LOGIN_BUTTON'] and not combined_login_and_register:
         % if course and settings.FEATURES.get('RESTRICT_ENROLL_BY_REG_METHOD') and course.enrollment_domain:
           <a class="btn btn-login" href="${reverse('course-specific-login', args=[course.id.to_deprecated_string()])}${login_query()}">${_("Sign in")}</a>
         % else: