diff --git a/lib/common.dart b/lib/common.dart
index 410e9ca03..803cdb3c5 100644
--- a/lib/common.dart
+++ b/lib/common.dart
@@ -202,6 +202,6 @@ Color str2color(String str, [alpha = 0xFF]) {
   return Color((hash & 0xFF7FFF) | (alpha << 24));
 }
 
-bool isAndroid;
-bool isIOS;
-bool isWeb;
+bool isAndroid = false;
+bool isIOS = false;
+bool isWeb = false;
diff --git a/lib/home_page.dart b/lib/home_page.dart
index 7daa30814..299a0ec1a 100644
--- a/lib/home_page.dart
+++ b/lib/home_page.dart
@@ -1,7 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 import 'package:tuple/tuple.dart';
-import 'package:package_info/package_info.dart';
 import 'package:url_launcher/url_launcher.dart';
 import 'dart:async';
 import 'common.dart';
@@ -342,13 +341,13 @@ void showServer(BuildContext context) {
 }
 
 Future<Null> showAbout(BuildContext context) async {
-  PackageInfo packageInfo = await PackageInfo.fromPlatform();
+  var version = await FFI.getVersion();
   showAlertDialog(
       context,
       (setState) => Tuple3(
           null,
           Wrap(direction: Axis.vertical, spacing: 12, children: [
-            Text('Version: ${packageInfo.version}'),
+            Text('Version: $version'),
             InkWell(
                 onTap: () async {
                   const url = 'https://rustdesk.com/';
diff --git a/lib/model.dart b/lib/model.dart
index d914e5b0f..6eb2c0e97 100644
--- a/lib/model.dart
+++ b/lib/model.dart
@@ -611,6 +611,10 @@ class FFI {
   static void setByName(String name, [String value = '']) {
     PlatformFFI.setByName(name, value);
   }
+
+  static Future<String> getVersion() async {
+    return await PlatformFFI.getVersion();
+  }
 }
 
 class Peer {
@@ -690,32 +694,11 @@ void initializeCursorAndCanvas() async {
   FFI.canvasModel.update(xCanvas, yCanvas, scale);
 }
 
-final langs = <String, Map<String, String>>{
-  'cn': <String, String>{
-    'Remote ID': '远程ID',
-    'Paste': '粘贴',
-    'Are you sure to close the connection?': '是否确认关闭连接？',
-    'Download new version': '下载新版本',
-    'Touch mode': '触屏模式',
-    'Reset canvas': '重置画布',
-  },
-  'en': <String, String>{}
-};
-
-final bool isCn = localeName.startsWith('zh') &&
-    (localeName.endsWith('CN') || localeName.endsWith('SG'));
-
 String translate(String name) {
   if (name.startsWith('Failed') && name.contains(':')) {
     return name.split(': ').map((x) => translate(x)).join(': ');
   }
-  final tmp = isCn ? langs['cn'] : langs['en'];
-  final v = tmp[name];
-  if (v == null) {
-    var a = 'translate';
-    var b = '{"locale": "$localeName", "text": "$name"}';
-    return FFI.getByName(a, b);
-  } else {
-    return v;
-  }
+  var a = 'translate';
+  var b = '{"locale": "$localeName", "text": "$name"}';
+  return FFI.getByName(a, b);
 }
diff --git a/lib/native_model.dart b/lib/native_model.dart
index cee8bd0bb..2c9df78b3 100644
--- a/lib/native_model.dart
+++ b/lib/native_model.dart
@@ -4,7 +4,8 @@ import 'dart:ffi';
 import 'package:ffi/ffi.dart';
 import 'package:path_provider/path_provider.dart';
 import 'package:device_info/device_info.dart';
-import "common.dart";
+import 'package:package_info/package_info.dart';
+import 'common.dart';
 
 class RgbaFrame extends Struct {
   @Uint32()
@@ -38,6 +39,11 @@ class PlatformFFI {
     return Uint8List.sublistView(ref.data.asTypedList(ref.len));
   }
 
+  static Future<String> getVersion() async {
+    PackageInfo packageInfo = await PackageInfo.fromPlatform();
+    return packageInfo.version;
+  }
+
   static String getByName(String name, [String arg = '']) {
     if (_getByName == null) return '';
     var a = name.toNativeUtf8();
diff --git a/lib/remote_page.dart b/lib/remote_page.dart
index c5733c83c..dea7b4a56 100644
--- a/lib/remote_page.dart
+++ b/lib/remote_page.dart
@@ -78,7 +78,8 @@ class _RemotePageState extends State<RemotePage> {
     return _bottom >= 100;
   }
 
-  void interval() {
+  // crash on web before widgit initiated.
+  void intervalUnsafe() {
     var v = MediaQuery.of(context).viewInsets.bottom;
     if (v != _bottom) {
       resetTool();
@@ -92,6 +93,12 @@ class _RemotePageState extends State<RemotePage> {
     FFI.ffiModel.update(widget.id, context, handleMsgbox);
   }
 
+  void interval() {
+    try {
+      intervalUnsafe();
+    } catch (e) {}
+  }
+
   void handleMsgbox(Map<String, dynamic> evt, String id) {
     var type = evt['type'];
     var title = evt['title'];
diff --git a/lib/web_model.dart b/lib/web_model.dart
index 6000401b3..a3ddf01fb 100644
--- a/lib/web_model.dart
+++ b/lib/web_model.dart
@@ -10,6 +10,10 @@ class PlatformFFI {
     // return Uint8List.sublistView(ref.data.asTypedList(ref.len));
   }
 
+  static Future<String> getVersion() async {
+    return '';
+  }
+
   static String getByName(String name, [String arg = '']) {
     return js.context.callMethod('getByName', [name, arg]);
   }
@@ -20,6 +24,7 @@ class PlatformFFI {
 
   static Future<Null> init() async {
     isWeb = true;
+    js.context.callMethod('init');
   }
 }
 
diff --git a/web/index.html b/web/index.html
index 57cef37e2..44f4ece57 100644
--- a/web/index.html
+++ b/web/index.html
@@ -32,6 +32,8 @@
   <title>RustDesk</title>
   <link rel="manifest" href="manifest.json">
   <script src="ogvjs/ogv.js"></script>
+   <script type="module" crossorigin src="/assets/index.d55bf9f9.js"></script>
+  <link rel="modulepreload" href="/assets/vendor.fd8ceed9.js">
 </head>
 <body>
   <!-- This script installs service_worker.js to provide PWA functionality to