diff --git a/src/OpenIddict.Client.SystemIntegration/OpenIddictClientSystemIntegrationHandlers.Authentication.cs b/src/OpenIddict.Client.SystemIntegration/OpenIddictClientSystemIntegrationHandlers.Authentication.cs
index 49cae0fd..c38c61c5 100644
--- a/src/OpenIddict.Client.SystemIntegration/OpenIddictClientSystemIntegrationHandlers.Authentication.cs
+++ b/src/OpenIddict.Client.SystemIntegration/OpenIddictClientSystemIntegrationHandlers.Authentication.cs
@@ -157,10 +157,15 @@ public static partial class OpenIddictClientSystemIntegrationHandlers
                             source.SetResult(url);
                         }
 
-                        else
+                        else if (error is not null)
                         {
                             source.SetException(new NSErrorException(error));
                         }
+
+                        else
+                        {
+                            source.SetException(new InvalidOperationException(SR.GetResourceString(SR.ID0448)));
+                        }
                     });
 
 #if SUPPORTS_PRESENTATION_CONTEXT_PROVIDER
diff --git a/src/OpenIddict.Client.SystemIntegration/OpenIddictClientSystemIntegrationHandlers.Session.cs b/src/OpenIddict.Client.SystemIntegration/OpenIddictClientSystemIntegrationHandlers.Session.cs
index 9bc57a57..84493d89 100644
--- a/src/OpenIddict.Client.SystemIntegration/OpenIddictClientSystemIntegrationHandlers.Session.cs
+++ b/src/OpenIddict.Client.SystemIntegration/OpenIddictClientSystemIntegrationHandlers.Session.cs
@@ -157,10 +157,15 @@ public static partial class OpenIddictClientSystemIntegrationHandlers
                             source.SetResult(url);
                         }
 
-                        else
+                        else if (error is not null)
                         {
                             source.SetException(new NSErrorException(error));
                         }
+
+                        else
+                        {
+                            source.SetException(new InvalidOperationException(SR.GetResourceString(SR.ID0448)));
+                        }
                     });
 
 #if SUPPORTS_PRESENTATION_CONTEXT_PROVIDER