I have 'g-recaptcha-response': [ '', '03AOLTBLTmXVEzta....]
temporarily solved the problem by replacing
var query_string = 'secret=' + this._secret_key + '&response=' + response;
on
var query_string = 'secret=' + this._secret_key + '&response=' + response[1];
I have
'g-recaptcha-response': [ '', '03AOLTBLTmXVEzta....]
temporarily solved the problem by replacingvar query_string = 'secret=' + this._secret_key + '&response=' + response;
onvar query_string = 'secret=' + this._secret_key + '&response=' + response[1];