The "JsonPeek" task was not found

[RobSmyth]

Describe the Bug

I'm unable to compile a project using JsonPeek. It fails with the error:

Error (active) MSB4036 The "JsonPeek" task was not found. Check the following: 1.) The name of the task in the project file is the same as the name of the task class. 2.) The task class is "public" and implements the Microsoft.Build.Framework.ITask interface. 3.) The task is correctly declared with in the project file, or in the *.tasks files located in the "C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Current\Bin\amd64" directory.

Steps to Reproduce

In Visual Studio 2022:

1. Create a new .net 8.0 C# assembly project.
2. Add the NuGet package JsonPeek version 1.2.0 package to the project.
3. In the csproj file add:

 <Target Name="PeekSimpleValue"
        BeforeTargets="Clean;Build;Pack;GenerateNuspec;SetTeamCityBuildLabel">

  <JsonPeek ContentPath="$(Git2SemVer_SharedVersioningPropsFile)" Empty="$empty" Query="$.InformationalVersion">
   <Output TaskParameter="Result" PropertyName="Git2SemVer_InformationalVersion" />
 </JsonPeek>

  <PropertyGroup>
   <InformationalVersion>$(Git2SemVer_InformationalVersion)</InformationalVersion>
  </PropertyGroup>

 </Target>

4. Compile. The compile fails.

Expected Behavior

Compile without error.

Exception with Stack Trace

No exception. MSBuild error given above.

Version Info

1.2.0

Additional Info

It works, on Windows, if I add to the csproj:

 <UsingTask TaskName="JsonPeek" AssemblyFile="C:\Users\Robert\.nuget\packages\jsonpeek\1.2.0\build\JsonPeek.dll"/>

This fails if using dotnet CLI to build on linux.

This also fails:

 <UsingTask TaskName="JsonPeek" AssemblyFile="JsonPeek.dll"/>

[RobSmyth]

Further information. It appears to only fail to load on a rebuild. A build gives a different (correct) error:

Severity	Code	Description	Project	File	Line	Suppression State
Error (active)	MSB4181	The "JsonPeek" task returned false but did not log an error.	

This build error is probably correct as I did not have a proper query in place.

[RobSmyth]

This is not a JsonPeek bug. I believe the issue is MSBuild's task handling in multi-targeted project. The example I have (new project with one target) was not a reliable example.

When my project is single target (and VS rebooted, obj directories deleted, etc) ... all is good.

This can be closed.