Source Code added

mobile/lib/constants/errors.dart

@@ -0,0 +1,11 @@
+/// Base class which is used to check if an Exception is a custom exception
+sealed class ImmichErrors {
+  const ImmichErrors();
+}
+
+class NoResponseDtoError extends ImmichErrors implements Exception {
+  const NoResponseDtoError();
+
+  @override
+  String toString() => "Response Dto is null";
+}