Potential fix.

Nuget.config

@@ -3,6 +3,5 @@
   <packageSources>
     <add key="myget.org" value="https://dotnet.myget.org/F/orleans-ci/api/v3/index.json" protocolVersion="3" />
     <add key="nuget.org" value="https://api.nuget.org/v3/index.json" protocolVersion="3" />
-    <add key="localfeed" value="libs" />
   </packageSources>
 </configuration>

src/Squidex.Domain.Apps.Entities/Squidex.Domain.Apps.Entities.csproj

@@ -15,7 +15,7 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="GraphQL" Version="2.0.0" />
-    <PackageReference Include="Microsoft.Orleans.OrleansCodeGenerator.Build.MSBuild" Version="2.1.0-ci.20180919.3 ">
+    <PackageReference Include="Microsoft.Orleans.CodeGenerator.MSBuild" Version="2.1.0-ci.20180919.3 ">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>

src/Squidex.Infrastructure/Squidex.Infrastructure.csproj

@@ -11,11 +11,11 @@
     <PackageReference Include="Microsoft.Extensions.Caching.Abstractions" Version="2.1.2" />
     <PackageReference Include="Microsoft.Extensions.Logging" Version="2.1.1" />
     <PackageReference Include="Microsoft.OData.Core" Version="7.5.0" />
-    <PackageReference Include="Microsoft.Orleans.Core" Version="2.1.0-ci.20180919.3 " />
-    <PackageReference Include="Microsoft.Orleans.OrleansCodeGenerator.Build.MSBuild" Version="2.1.0-ci.20180919.3 ">
+	    <PackageReference Include="Microsoft.Orleans.CodeGenerator.MSBuild" Version="2.1.0-ci.20180919.3 ">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
+    <PackageReference Include="Microsoft.Orleans.Core" Version="2.1.0-ci.20180919.3 " />
     <PackageReference Include="Microsoft.Orleans.OrleansRuntime" Version="2.1.0-ci.20180919.3 " />
     <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
     <PackageReference Include="NodaTime" Version="2.4.0" />