Added custom error screen widget

lib/main.dart

@@ -5,6 +5,7 @@ import 'package:flutter/services.dart';
 import 'package:jiffy/jiffy.dart';
 import 'package:marianum_mobile/data/timetable/timetableProps.dart';
 import 'package:marianum_mobile/screen/login/login.dart';
+import 'package:marianum_mobile/widget/errorView.dart';
 import 'package:provider/provider.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
@@ -20,6 +21,10 @@ Future<void> main() async {
   ByteData data = await PlatformAssetBundle().load('assets/ca/lets-encrypt-r3.pem');
   SecurityContext.defaultContext.setTrustedCertificatesBytes(data.buffer.asUint8List());
 
+  ErrorWidget.builder = (error) {
+    return ErrorView(icon: Icons.phonelink_erase_rounded, text: error.toString());
+  };
+
   runApp(
       MultiProvider(
         providers: [

pubspec.yaml

@@ -107,7 +107,6 @@ flutter:
     - assets/ca/
     - assets/background/
     - assets/logo/
-    - assets/logo/icon
     - assets/img/
 
   # An image asset can refer to one or more resolution-specific "variants", see