JS TypeError blocks the application #7

When I tried the application clicking on the G+ button nothing happened. I turned on Firebug and I get this error message

TypeError: can't convert authResult[field] to primitive type

$('#authResult').append(' ' + field + ': ' + authResult[field] + '<br/>');

localhost:4567 (line 87)

For me the solution was to eliminate the output of the 'status' variable:
index.html lines 87-89

        if (field != 'status') {
          $('#authResult').append(' ' + field + ': ' + authResult[field] + '<br/>');
        }