the csproj build has been failing (but the sln project builds successfully)

[KirisameMarisa]

How to reproduse

command: dotnet build Application\WPF\BocchiTracker.Client\BocchiTracker.Client.csproj

F:\BocchiTracker>dotnet build Application\WPF\BocchiTracker.Client\BocchiTracker.Client.csproj
C:\Program Files\dotnet\sdk\7.0.304\NuGet.targets(156,5): error : Invalid framework identifier ''. [F:\BocchiTracker\Application\WPF\BocchiTracker.Client\BocchiTracker.Client.csproj]

command: dotnet build Application\Tests\BocchiTracker.UnitTests\BocchiTracker.UnitTests.csproj

F:\BocchiTracker>dotnet build Application\Tests\BocchiTracker.UnitTests\BocchiTracker.UnitTests.csproj
C:\Program Files\dotnet\sdk\7.0.304\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.TargetFrameworkInference.targets(92,5):
error NETSDK1013: TargetFramework value '' was not recognized.
not recognized. The spelling may be incorrect. If it is correct, you must explicitly specify the TargetFrameworkIdentifier or TargetFrameworkVersion property (or both).
[F:\BocchiTracker\Application\Tests\BocchiTracker.UnitTests\BocchiTracker.UnitTests.csproj]