fix it

android/app/src/main/AndroidManifest.xml

@@ -10,7 +10,9 @@
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
             android:hardwareAccelerated="true"
-            android:windowSoftInputMode="adjustResize">
+            android:windowSoftInputMode="adjustResize"
+            android:allowBackup="false" 
+            android:fullBackupContent="false">
             <!-- Specifies an Android theme to apply to this Activity as soon as
                  the Android process has started. This theme is visible to the user
                  while the Flutter UI initializes. After that, this theme continues

lib/core/service/time_table.service.dart

@@ -159,6 +159,11 @@ class TimeTableService with ChangeNotifier {
 
   Future<String> getSchool() async {
     final prefs = await SharedPreferences.getInstance();
+    final school = prefs.getString("school");
+
+    if (school == null || school.isEmpty) {
+      return "bbs1-mainz";
+    }
     return prefs.getString("school") ?? "bbs1-mainz";
   }
 

lib/ui/screens/login/login.screen.dart

@@ -15,7 +15,7 @@ class LoginScreen extends ConsumerStatefulWidget {
 class _LoginScreenState extends ConsumerState<LoginScreen> {
   final usernameController = TextEditingController();
   final passwordController = TextEditingController();
-  final schoolController = TextEditingController();
+  final schoolController = TextEditingController(text: "bbs1-mainz");
   final passwordFocusNode = FocusNode();
   final schoolFocusNode = FocusNode();
 
@@ -33,11 +33,11 @@ class _LoginScreenState extends ConsumerState<LoginScreen> {
   Future<void> getUserDataFromStorage() async {
     final username = await ref.read(timeTableService).getUserName();
     final password = await ref.read(timeTableService).getPassword();
-    final school = await ref.read(timeTableService).getSchool();
+    const school = "bbs1-mainz";
 
     usernameController.text = username;
     passwordController.text = password;
-    schoolController.text = school;
+    schoolController.text = "bbs1-mainz";
 
     if (username.isNotEmpty && password.isNotEmpty && school.isNotEmpty) {
       ref.read(timeTableService).login(

pubspec.yaml

@@ -15,7 +15,7 @@ dependencies:
   flutter:
     sdk: flutter
   flutter_search_bar: ^3.0.0-dev.1
-  flutter_secure_storage: ^5.0.2
+  flutter_secure_storage: 4.2.1
   flutter_staggered_animations: ^1.0.0
   fluttericon: ^2.0.0
   google_fonts: 2.2.0

windows/flutter/generated_plugin_registrant.cc

@@ -6,12 +6,9 @@
 
 #include "generated_plugin_registrant.h"
 
-#include <flutter_secure_storage_windows/flutter_secure_storage_windows_plugin.h>
 #include <url_launcher_windows/url_launcher_windows.h>
 
 void RegisterPlugins(flutter::PluginRegistry* registry) {
-  FlutterSecureStorageWindowsPluginRegisterWithRegistrar(
-      registry->GetRegistrarForPlugin("FlutterSecureStorageWindowsPlugin"));
   UrlLauncherWindowsRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("UrlLauncherWindows"));
 }

windows/flutter/generated_plugins.cmake

@@ -3,7 +3,6 @@
 #
 
 list(APPEND FLUTTER_PLUGIN_LIST
-  flutter_secure_storage_windows
   url_launcher_windows
 )