when DNS section is disabled, the web panel doesn't prompt properly

[BackTrackCRoot]

XHRGET
http://127.0.0.1:9090/dns/query?name=www.google.com&type=A
[HTTP/1.1 500 Internal Server Error 1ms]

XHRGET
http://127.0.0.1:9090/dns/query?name=www.google.com&type=A
[HTTP/1.1 500 Internal Server Error 1ms]

Uncaught (in promise) HTTPError: Request failed with status code 500 Internal Server Error
    jf http://127.0.0.1:9090/ui/assets/vendor-ec1fbc1a.js:28
    o http://127.0.0.1:9090/ui/assets/vendor-ec1fbc1a.js:28
    _retry http://127.0.0.1:9090/ui/assets/vendor-ec1fbc1a.js:28
    _retry http://127.0.0.1:9090/ui/assets/vendor-ec1fbc1a.js:28
    create http://127.0.0.1:9090/ui/assets/vendor-ec1fbc1a.js:28
    r http://127.0.0.1:9090/ui/assets/vendor-ec1fbc1a.js:28
    onSubmit http://127.0.0.1:9090/ui/assets/Config-0a55963b.js:1
    E http://127.0.0.1:9090/ui/assets/vendor-ec1fbc1a.js:1

I noticed through my browser's debug function that after returning 500, the panel wasn't processing properly.