diff --git a/app/ui.js b/app/ui.js
index 90dc7189..caba8e18 100644
--- a/app/ui.js
+++ b/app/ui.js
@@ -120,7 +120,7 @@ const UI = {
 
         document.documentElement.classList.remove("noVNC_loading");
 
-        let autoconnect = WebUtil.getConfigVar('autoconnect', false);
+        let autoconnect = UI.getSetting('autoconnect');
         if (autoconnect === 'true' || autoconnect == '1') {
             autoconnect = true;
             UI.connect();
@@ -160,11 +160,14 @@ const UI = {
 
         /* Populate the controls if defaults are provided in the URL */
         UI.initSetting('encrypt', (window.location.protocol === "https:"));
+        UI.initSetting('password');
+        UI.initSetting('autoconnect', false);
         UI.initSetting('view_clip', false);
         UI.initSetting('resize', 'off');
         UI.initSetting('quality', 6);
         UI.initSetting('compression', 2);
         UI.initSetting('shared', true);
+        UI.initSetting('bell', 'on');
         UI.initSetting('view_only', false);
         UI.initSetting('show_dot', false);
         UI.initSetting('path', 'websockify');
@@ -759,9 +762,12 @@ const UI = {
         let value = UI.getSetting(name);
 
         const ctrl = document.getElementById('noVNC_setting_' + name);
+        if (ctrl === null) {
+            return;
+        }
+
         if (ctrl.type === 'checkbox') {
             ctrl.checked = value;
-
         } else if (typeof ctrl.options !== 'undefined') {
             for (let i = 0; i < ctrl.options.length; i += 1) {
                 if (ctrl.options[i].value === value) {
@@ -794,7 +800,8 @@ const UI = {
     getSetting(name) {
         const ctrl = document.getElementById('noVNC_setting_' + name);
         let val = WebUtil.readSetting(name);
-        if (typeof val !== 'undefined' && val !== null && ctrl.type === 'checkbox') {
+        if (typeof val !== 'undefined' && val !== null &&
+            ctrl !== null && ctrl.type === 'checkbox') {
             if (val.toString().toLowerCase() in {'0': 1, 'no': 1, 'false': 1}) {
                 val = false;
             } else {
@@ -998,7 +1005,7 @@ const UI = {
         const path = UI.getSetting('path');
 
         if (typeof password === 'undefined') {
-            password = WebUtil.getConfigVar('password');
+            password = UI.getSetting('password');
             UI.reconnectPassword = password;
         }
 
@@ -1728,7 +1735,7 @@ const UI = {
     },
 
     bell(e) {
-        if (WebUtil.getConfigVar('bell', 'on') === 'on') {
+        if (UI.getSetting('bell') === 'on') {
             const promise = document.getElementById('noVNC_bell').play();
             // The standards disagree on the return value here
             if (promise) {