title: Keycloak error invalid_client Bearer only not allowed
body: <p>I'm trying to deploy a very simple REST service secured with keycloak and am getting the following error: </p>
  
  <blockquote>
    <p>Caused by:
    org.keycloak.authorization.client.util.HttpResponse.Exception:
    Unexpected response from server: 400 / Bad Request / Response from
    server: ("error":"invalid_client","error_description":"Bearer-only not
    allowed")</p>
  </blockquote>
  
  <p>What does this error mean? How can I fix it? </p>