I keep getting this error when I try to run the pipelines for my azure backend functions:

[error]C:\Users\VssAdministrator.nuget\packages\microsoft.net.sdk.functions\1.0.27\build\netstandard1.0\Microsoft.NET.Sdk.Functions.Build.targets(41,5): Error : It was not possible to find any compatible framework version

The framework 'Microsoft.NETCore.App', version '2.1.0' was not found.

It's a pretty old program, but yesterday was the first time that the build has failed and I don't know how to fix it. It happens both in the develop and main branch so I'm guessing it's a change from Azure.

CodePudding user response：

As documented in this GitHub issue .NET Core 2.1 has been removed from all build agent images.

Possible impact

If your project depends on a pre-installed .Net 2.1 it can be broken.

You can try to use the setup dotnet task to explicitly install .NET Core 2.1.

- uses: actions/setup-dotnet@v1
  with:
    dotnet-version: '2.1.x'

Please be advised .NET Core 2.1 has been out of support since August 21, 2021 (see .NET and .NET Core Support Policy). An upgrade to a currently supported version like .NET Core 3.1 or higher should not be a lot of work and is well worth the effort.