Think the error may be unrelated to the upgrade, it builds fine, publishes as framework dependent fine, but self contained fails.
Here is what the errors stay; clearly something needs to be downloaded, but trying to run package restore in UI fails.
Error Failed to retrieve information about 'Microsoft.AspNetCore.App.Runtime.win-x86' from remote source 'https://www.nuget.org/api/v2/FindPackagesById()?id='Microsoft.AspNetCore.App.Runtime.win-x86'&semVerLevel=2.0.0'.An error occurred while sending the request.The underlying connection was closed: An unexpected error occurred on a send.Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.An existing connection was forcibly closed by the remote host MY_PROJECT 0
Error The runtime pack for Microsoft.AspNetCore.App.Runtime.win-x86 was not downloaded. Try running a NuGet restore with the RuntimeIdentifier 'win-x86'. HarvesterApi 0
This is what I get from output.
Retrying 'FindPackagesByIdAsyncCore' for source 'https://www.nuget.org/api/v2/FindPackagesById()?id='Microsoft.AspNetCore.App.Runtime.win-x86'&semVerLevel=2.0.0'.An error occurred while sending the request.The underlying connection was closed: An unexpected error occurred on a send.Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.An existing connection was forcibly closed by the remote hostRetrying 'FindPackagesByIdAsyncCore' for source 'https://www.nuget.org/api/v2/FindPackagesById()?id='Microsoft.AspNetCore.App.Runtime.win-x86'&semVerLevel=2.0.0'.An error occurred while sending the request.The underlying connection was closed: An unexpected error occurred on a send.Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.An existing connection was forcibly closed by the remote hostC:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\Common7\IDE\CommonExtensions\Microsoft\NuGet\NuGet.targets(131,5): Error : Failed to retrieve information about 'Microsoft.AspNetCore.App.Runtime.win-x86' from remote source 'https://www.nuget.org/api/v2/FindPackagesById()?id='Microsoft.AspNetCore.App.Runtime.win-x86'&semVerLevel=2.0.0'.An error occurred while sending the request.The underlying connection was closed: An unexpected error occurred on a send.Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.An existing connection was forcibly closed by the remote hostC:\Program Files\dotnet\sdk\5.0.402\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(415,5): Error NETSDK1112: The runtime pack for Microsoft.AspNetCore.App.Runtime.win-x86 was not downloaded. Try running a NuGet restore with the RuntimeIdentifier 'win-x86'.
Not sure why nuget would be closing connections like that? Do I need to download something else?