diff --git a/backend/src/Squidex.Domain.Apps.Entities/AppProviderExtensions.cs b/backend/src/Squidex.Domain.Apps.Entities/AppProviderExtensions.cs
index ca0fe4eceb..ac5608af12 100644
--- a/backend/src/Squidex.Domain.Apps.Entities/AppProviderExtensions.cs
+++ b/backend/src/Squidex.Domain.Apps.Entities/AppProviderExtensions.cs
@@ -26,6 +26,11 @@ public static async Task<ResolvedComponents> GetComponentsAsync(this IAppProvide
 
             async Task ResolveWithIdsAsync(IField field, ReadonlyList<DomainId>? schemaIds)
             {
+                if (schemaIds == null)
+                {
+                    return;
+                }
+
                 foreach (var schemaId in schemaIds)
                 {
                     if (schemaId == schema.Id)