On Sitecore 10.1.1, I've got Sitecore Headless Services Server XP 18.0.0 rev. 00473 installed. According to documentation, that's the correct version. The package brings Sitecore.LayoutService.dll with version 7.1.0:

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Now I'd like to extend the LayoutService API. I referenced the latest available Sitecore.LayoutService NuGet pachage which has version 10.1.0. But now, when I try to reach the data via API, I receive error:

2396 11:41:16 ERROR Exception during Layout Service RenderItem (configuration: jss, item: {A843B9EF-04E4-4631-A2F0-EE4C6F2277E7})
cm_1         | Exception: System.InvalidOperationException
cm_1         | Message: Could not find type 'Sitecore.LayoutService.Serialization.Pipelines.GetFieldSerializer.GetIntegerFieldSerializer, Sitecore.LayoutService'

I checked the assembly delivered via NuGet and the type is indeed missing there. The LayoutService assembly version is 7.0.0, not 7.1.0:

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Am I missing smth? How do I reference the proper 7.1 version via NuGet?

1 Answer 1


I agree NuGet Packages for Layout Services are confusing here. But You need to use sc-packages - Sitecore.LayoutService 7.1.0 here.

PM> Install-Package Sitecore.LayoutService -Version 7.1.0 -Source https://sitecore.myget.org/F/sc-packages/api/v3/index.json

This is the correct version for you. You will find below details for dll -

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