Error accessing a WCF service: "IIS specified authentication schemes 'Basic, Anonymous', but the binding only supports specification of exactly one authentication scheme..."

To resolve this problem, add the following to the web.config file to disable basic authentication:
 
<system.webServer>
  <security>
    <authentication>
      <basicAuthentication enabled="false" />
    </authentication>
  </security>
</system.webServer>
 
Note that Anonymous authentication can also be disabled using:
 
<anonymousAuthentication enabled="false" />