Fix create invite post request

(cherry picked from commit 0688c272c2)

src/js/client.js

@@ -980,7 +980,7 @@ angular.module('Application').service('Client', ['$http', '$interval', 'md5', 'N
     };
 
     Client.prototype.createInvite = function (userId, callback) {
-        post('/api/v1/users/' + userId + '/create_invite', null, function (error, data, status) {
+        post('/api/v1/users/' + userId + '/create_invite', {}, null, function (error, data, status) {
             if (error) return callback(error);
             if (status !== 200) return callback(new ClientError(status, data));