diff --git a/src/Squidex.Infrastructure/Orleans/J{T}.cs b/src/Squidex.Infrastructure/Orleans/J{T}.cs
index 00bb93f45..c6f28cd45 100644
--- a/src/Squidex.Infrastructure/Orleans/J{T}.cs
+++ b/src/Squidex.Infrastructure/Orleans/J{T}.cs
@@ -39,6 +39,11 @@ namespace Squidex.Infrastructure.Orleans
             return new J<T>(d);
         }
 
+        public override string ToString()
+        {
+            return value?.ToString() ?? string.Empty;
+        }
+
         public static Task<J<T>> AsTask(T value)
         {
             return Task.FromResult<J<T>>(value);
diff --git a/src/Squidex/Config/Domain/EntitiesServices.cs b/src/Squidex/Config/Domain/EntitiesServices.cs
index c8583e713..cabc20e5c 100644
--- a/src/Squidex/Config/Domain/EntitiesServices.cs
+++ b/src/Squidex/Config/Domain/EntitiesServices.cs
@@ -11,6 +11,7 @@ using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Options;
 using Migrate_01;
 using Migrate_01.Migrations;
+using Orleans;
 using Squidex.Domain.Apps.Core.Apps;
 using Squidex.Domain.Apps.Core.Scripting;
 using Squidex.Domain.Apps.Entities;
@@ -109,6 +110,8 @@ namespace Squidex.Config.Domain
             services.AddSingletonAs<JintScriptEngine>()
                 .As<IScriptEngine>();
 
+            services.AddSingleton<Func<IGrainCallContext, string>>(DomainObjectGrainFormatter.Format);
+
             services.AddTransientAs<AppGrain>()
                 .AsSelf();