Upgrading in Visual Studio from 13.7.2 to 13.8.0 gives no error, but when I try to build the solution I get this error:
InvalidOperationException: Sequence contains more than one element
at System.Linq.Enumerable.SingleOrDefault[TSource](IEnumerable`1 source)
at Microsoft.AspNetCore.StaticWebAssets.Tasks.GenerateStaticWebAssetsDevelopmentManifest.<ComputeManifestAssets>d__19.MoveNext()
at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
at Microsoft.AspNetCore.StaticWebAssets.Tasks.GenerateStaticWebAssetsDevelopmentManifest.ComputeDevelopmentManifest(IEnumerable`1 assets, IEnumerable`1 discoveryPatterns)
at Microsoft.AspNetCore.StaticWebAssets.Tasks.GenerateStaticWebAssetsDevelopmentManifest.Execute()
Any ideas?