diff --git a/lib/models/model.dart b/lib/models/model.dart
index 4f775f23f..bb6fefe25 100644
--- a/lib/models/model.dart
+++ b/lib/models/model.dart
@@ -12,6 +12,7 @@ import 'package:flutter/material.dart';
 import 'package:tuple/tuple.dart';
 import 'dart:async';
 import '../common.dart';
+import '../widgets/dialog.dart';
 import 'native_model.dart' if (dart.library.html) 'web_model.dart';
 
 typedef HandleMsgBox = void Function(Map<String, dynamic> evt, String id);
@@ -26,6 +27,8 @@ class FfiModel with ChangeNotifier {
   final _permissions = Map<String, bool>();
   bool? _secure;
   bool? _direct;
+  Timer? _timer;
+  var _reconnects = 1;
 
   get permissions => _permissions;
 
@@ -78,6 +81,8 @@ class FfiModel with ChangeNotifier {
     _secure = null;
     _direct = null;
     _inputBlocked = false;
+    _timer?.cancel();
+    _timer = null;
     clearPermissions();
   }
 
@@ -107,7 +112,7 @@ class FfiModel with ChangeNotifier {
     _permissions.clear();
   }
 
-  void update(String peerId, HandleMsgBox handleMsgBox) {
+  void update(String peerId) {
     var pos;
     for (;;) {
       var evt = FFI.popEvent();
@@ -193,6 +198,35 @@ class FfiModel with ChangeNotifier {
     notifyListeners();
   }
 
+  void handleMsgBox(Map<String, dynamic> evt, String id) {
+    var type = evt['type'];
+    var title = evt['title'];
+    var text = evt['text'];
+    if (type == 're-input-password') {
+      wrongPasswordDialog(id);
+    } else if (type == 'input-password') {
+      enterPasswordDialog(id);
+    } else {
+      var hasRetry = evt['hasRetry'] == 'true';
+      print(evt);
+      showMsgBox(type, title, text, hasRetry);
+    }
+  }
+
+  void showMsgBox(String type, String title, String text, bool hasRetry) {
+    msgBox(type, title, text);
+    if (hasRetry) {
+      _timer?.cancel();
+      _timer = Timer(Duration(seconds: _reconnects), () {
+        FFI.reconnect();
+        showLoading(translate('Connecting...'));
+      });
+      _reconnects *= 2;
+    } else {
+      _reconnects = 1;
+    }
+  }
+
   void handlePeerInfo(Map<String, dynamic> evt) {
     EasyLoading.dismiss();
     DialogManager.reset();
diff --git a/lib/models/server_model.dart b/lib/models/server_model.dart
index e406b1e4a..a7efd25bc 100644
--- a/lib/models/server_model.dart
+++ b/lib/models/server_model.dart
@@ -13,8 +13,8 @@ class ServerModel with ChangeNotifier {
   bool _isStart = false;
   bool _mediaOk = false;
   bool _inputOk = false;
-  late bool _audioOk;
-  late bool _fileOk;
+  bool _audioOk = false;
+  bool _fileOk = false;
   final _serverId = TextEditingController(text: _emptyIdShow);
   final _serverPasswd = TextEditingController(text: "");
 
@@ -48,6 +48,7 @@ class ServerModel with ChangeNotifier {
         ..["name"] = "enable-keyboard"
         ..["value"] = 'N';
       FFI.setByName('option', jsonEncode(res)); // input false by default
+      notifyListeners();
     }();
   }
 
@@ -110,7 +111,7 @@ class ServerModel with ChangeNotifier {
     notifyListeners();
     FFI.setByName("ensure_init_event_queue");
     _interval = Timer.periodic(Duration(milliseconds: 30), (timer) {
-      FFI.ffiModel.update("", (_, __) {});
+      FFI.ffiModel.update("");
     });
     await FFI.invokeMethod("init_service");
     FFI.setByName("start_service");
diff --git a/lib/pages/file_manager_page.dart b/lib/pages/file_manager_page.dart
index 71bf5088a..e93c72c10 100644
--- a/lib/pages/file_manager_page.dart
+++ b/lib/pages/file_manager_page.dart
@@ -21,8 +21,6 @@ class _FileManagerPageState extends State<FileManagerPage> {
   final model = FFI.fileModel;
   final _selectedItems = SelectedItems();
   Timer? _interval;
-  Timer? _timer;
-  var _reconnects = 1;
   final _breadCrumbScroller = ScrollController();
 
   @override
@@ -30,9 +28,8 @@ class _FileManagerPageState extends State<FileManagerPage> {
     super.initState();
     showLoading(translate('Connecting...'));
     FFI.connect(widget.id, isFileTransfer: true);
-
-    _interval = Timer.periodic(Duration(milliseconds: 30),
-        (timer) => FFI.ffiModel.update(widget.id, handleMsgBox));
+    _interval = Timer.periodic(
+        Duration(milliseconds: 30), (timer) => FFI.ffiModel.update(widget.id));
   }
 
   @override
@@ -193,35 +190,6 @@ class _FileManagerPageState extends State<FileManagerPage> {
     model.goToParentDirectory();
   }
 
-  void handleMsgBox(Map<String, dynamic> evt, String id) {
-    var type = evt['type'];
-    var title = evt['title'];
-    var text = evt['text'];
-    if (type == 're-input-password') {
-      wrongPasswordDialog(id);
-    } else if (type == 'input-password') {
-      enterPasswordDialog(id);
-    } else {
-      var hasRetry = evt['hasRetry'] == 'true';
-      print(evt);
-      showMsgBox(type, title, text, hasRetry);
-    }
-  }
-
-  void showMsgBox(String type, String title, String text, bool hasRetry) {
-    msgBox(type, title, text);
-    if (hasRetry) {
-      _timer?.cancel();
-      _timer = Timer(Duration(seconds: _reconnects), () {
-        FFI.reconnect();
-        showLoading(translate('Connecting...'));
-      });
-      _reconnects *= 2;
-    } else {
-      _reconnects = 1;
-    }
-  }
-
   breadCrumbScrollToEnd() {
     Future.delayed(Duration(milliseconds: 200), () {
       _breadCrumbScroller.animateTo(
diff --git a/lib/pages/remote_page.dart b/lib/pages/remote_page.dart
index fd7d578e8..9a8ede370 100644
--- a/lib/pages/remote_page.dart
+++ b/lib/pages/remote_page.dart
@@ -35,7 +35,6 @@ class _RemotePageState extends State<RemotePage> {
   var _fn = false;
   final FocusNode _focusNode = FocusNode();
   var _showEdit = false;
-  var _reconnects = 1;
   var _touchMode = false;
 
   @override
@@ -86,7 +85,7 @@ class _RemotePageState extends State<RemotePage> {
         }
       });
     }
-    FFI.ffiModel.update(widget.id, handleMsgBox);
+    FFI.ffiModel.update(widget.id);
   }
 
   void interval() {
@@ -95,35 +94,6 @@ class _RemotePageState extends State<RemotePage> {
     } catch (e) {}
   }
 
-  void handleMsgBox(Map<String, dynamic> evt, String id) {
-    var type = evt['type'];
-    var title = evt['title'];
-    var text = evt['text'];
-    if (type == 're-input-password') {
-      wrongPasswordDialog(id);
-    } else if (type == 'input-password') {
-      enterPasswordDialog(id);
-    } else {
-      var hasRetry = evt['hasRetry'] == 'true';
-      print(evt);
-      showMsgBox(type, title, text, hasRetry);
-    }
-  }
-
-  void showMsgBox(String type, String title, String text, bool hasRetry) {
-    msgBox(type, title, text);
-    if (hasRetry) {
-      _timer?.cancel();
-      _timer = Timer(Duration(seconds: _reconnects), () {
-        FFI.reconnect();
-        showLoading(translate('Connecting...'));
-      });
-      _reconnects *= 2;
-    } else {
-      _reconnects = 1;
-    }
-  }
-
   void handleInput(String newValue) {
     var oldValue = _value;
     _value = newValue;
diff --git a/pubspec.yaml b/pubspec.yaml
index d5f869d76..cdab37490 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -33,10 +33,6 @@ dependencies:
   external_path: ^1.0.1
   provider: ^5.0.0
   flutter_easyloading: ^3.0.3
-#  flutter_easyloading: # not Null safety 2.2.0
-#    git:
-#      url: git://github.com/open-trade/flutter_easyloading
-#    #path: flutter_easyloading
   tuple: ^2.0.0
   wakelock: ^0.5.2
   device_info: ^2.0.2