The package IDs below are referenced by Cake runners and the assemblies contained in these packages will be already loaded in the AppDomain, so by the time the addin tries to load it it's too late:

• Autofac
• Microsoft.CodeAnalysis.CSharp.Scripting
• Microsoft.CSharp
• Microsoft.DotNet.PlatformAbstractions
• Microsoft.Extensions.DependencyInjection
• Microsoft.NETCore.Platforms
• Microsoft.Win32.Registry
• Newtonsoft.Json
• NuGet.Common
• NuGet.Frameworks
• NuGet.Packaging
• NuGet.Protocol
• NuGet.Resolver
• NuGet.Versioning
• Spectre.Console
• System.Collections.Immutable
• System.Reflection.Metadata