Errors after updating packages

[loganmj]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

After updating package Microsoft.AspNetCore.SpaProxy from version 8.0.11 to version 9.0.0, I experience the following runtime error:

Microsoft.AspNetCore.Hosting.Diagnostics[11]
Hosting startup assembly exception
System.InvalidOperationException: Startup assembly Microsoft.AspNetCore.SpaProxy failed to execute. See the inner exception for more details.
---> System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.AspNetCore.SpaProxy, Culture=neutral, PublicKeyToken=null'. The system cannot find the file specified.
File name: 'Microsoft.AspNetCore.SpaProxy, Culture=neutral, PublicKeyToken=null'
at System.Reflection.RuntimeAssembly.InternalLoad(AssemblyName assemblyName, StackCrawlMark& stackMark, AssemblyLoadContext assemblyLoadContext, RuntimeAssembly requestingAssembly, Boolean throwOnFileNotFound)
at System.Reflection.Assembly.Load(AssemblyName assemblyRef)
at Microsoft.AspNetCore.Hosting.GenericWebHostBuilder.ExecuteHostingStartups()

I am running an ASP.NET project that targets framework version .NET 8.0. I verified that the project runs without error using Microsoft.AspNetCore.SpaProxy version 8.0.11. If it matters, I am using the MySql.EntityFrameworkCore package version 8.0.8 to interact with a MySQL database using EntityFramework.

I also had to rollback the following packages to version 8.0.11 for similar reasons:

• Microsoft.EntityFrameworkCore
• Microsoft.EntityFrameworkCore.Tools

When all three of these packages are rolled back, the code works again without issue.

Expected Behavior

I am running a simple API application that connects to a MySQL database. When I run/debug the application, I expect the server app to compile, and run. And I expect my front end application to be able to interact with the API to retrieve data from my database.

When the application runs, I instead get feedback from the console that the Microsoft.AspNetCore.SpaProxy dll failed to execute, and my server code will not run.

Steps To Reproduce

I am working with the following project in my Github profile: https://github.com/loganmj/WorldCities

In this project, you will see that if you run the project as-is, it should startup correctly, but if you upgrade to Microsoft.AspNetCore.SpaProxy version 9.0.0, the server code fails to run, with the error as I have desribed.

Exceptions (if any)

No response

.NET Version

9.0.100

Anything else?

Output of dotnet --info:

.NET SDK:
Version: 9.0.100
Commit: 59db016f11
Workload version: 9.0.100-manifests.3068a692
MSBuild version: 17.12.7+5b8665660

Runtime Environment:
OS Name: Windows
OS Version: 10.0.19045
OS Platform: Windows
RID: win-x64
Base Path: C:\Program Files\dotnet\sdk\9.0.100\

.NET workloads installed:
[android]
Installation Source: VS 17.11.35431.28
Manifest Version: 35.0.0-rc.2.152/9.0.100-rc.2
Manifest Path: C:\Program Files\dotnet\sdk-manifests\9.0.100-rc.2\microsoft.net.sdk.android\35.0.0-rc.2.152\WorkloadManifest.json
Install Type: Msi

[maccatalyst]
Installation Source: VS 17.11.35431.28
Manifest Version: 18.0.9600-net9-rc2/9.0.100-rc.2
Manifest Path: C:\Program Files\dotnet\sdk-manifests\9.0.100-rc.2\microsoft.net.sdk.maccatalyst\18.0.9600-net9-rc2\WorkloadManifest.json
Install Type: Msi

[ios]
Installation Source: VS 17.11.35431.28
Manifest Version: 18.0.9600-net9-rc2/9.0.100-rc.2
Manifest Path: C:\Program Files\dotnet\sdk-manifests\9.0.100-rc.2\microsoft.net.sdk.ios\18.0.9600-net9-rc2\WorkloadManifest.json
Install Type: Msi

[maui-windows]
Installation Source: VS 17.11.35431.28
Manifest Version: 9.0.0-rc.2.24503.2/9.0.100-rc.2
Manifest Path: C:\Program Files\dotnet\sdk-manifests\9.0.100-rc.2\microsoft.net.sdk.maui\9.0.0-rc.2.24503.2\WorkloadManifest.json
Install Type: Msi

[aspire]
Installation Source: VS 17.11.35431.28
Manifest Version: 8.2.2/8.0.100
Manifest Path: C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.sdk.aspire\8.2.2\WorkloadManifest.json
Install Type: Msi

Configured to use loose manifests when installing new manifests.

Host:
Version: 9.0.0
Architecture: x64
Commit: 9d5a6a9aa4

.NET SDKs installed:
8.0.110 [C:\Program Files\dotnet\sdk]
8.0.206 [C:\Program Files\dotnet\sdk]
8.0.403 [C:\Program Files\dotnet\sdk]
8.0.404 [C:\Program Files\dotnet\sdk]
9.0.100 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 6.0.36 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 7.0.20 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.10 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.11 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 9.0.0 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 6.0.36 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.20 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.6 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.10 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.11 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 9.0.0 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 6.0.36 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 7.0.20 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 8.0.6 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 8.0.10 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 8.0.11 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 9.0.0 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Other architectures found:
x86 [C:\Program Files (x86)\dotnet]
registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\x86\InstallLocation]

Environment variables:
Not set

global.json file:
Not found

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[BrennanConroy]

That's seems odd, you shouldn't even be able to build your application when targeting net8.0 and referencing 9.0 of Microsoft.AspNetCore.SpaProxy.

The Microsoft.AspNetCore.SpaProxy package only supports the net9.0 TFM. See https://www.nuget.org/packages/Microsoft.AspNetCore.SpaProxy#supportedframeworks-body-tab

Edit: Can repro, and it doesn't repro with other similar packages.

[wtgodbe]

Thanks for reporting this, looks like an instance of NuGet/Home#6932. #58995 should fix the underlying issue for 10.0 and beyond - for your particular project, 9.0.0 packages aren't compatible w/ the net8.0 TFM. You either need to update to net9.0 and update all your PackageReferences to 9.0.0, or stay on net8.0 and only use 8.0.* packages.