"Cannot find the specified testAssembly:" the project name is getting ommitted

I am getting this error even when I hard code the entire path from the volume to the file.

 The YAML code looks like this:

   - task: SpecFlowPlus@0
     displayName: 'Generate the SpecFlow + LivingDocs reports for C.com'
     inputs:
       generatorSource: 'FeatureFolder'
       projectFilePath: 'D:\Agent\_work\2\s\C.com'
       testAssemblyFilePath: 'D:\Agent\_work\2\s\C.com\bin\Debug\net6.0\Company_com.dll'
       projectName: 'Company.com site'
       testExecutionJson: 'D:\Agent\_work\2\s\C.com\bin\Debug\net6.0\TestExecution.json'
       projectLanguage: 'en'
       bindingAssemblies: 'D:\Agent\_work\2\s\C.com\bin\Debug\net6.0\Company_com.dll'
       output: 'FeatureData.json'
     continueOnError: true

And here is the error with the stack trace info

##[error]Error: Command failed: dotnet "D:\Agent\_work\_tasks\SpecFlowPlus_32f3fe66-8bfc-476e-8e2c-9b4b59432ffa\0.6.964\CLI\LivingDoc.CLI.dll" test-assembly "bin\Debug\net6.0\Company_com.dll" --output-type JSON --test-execution-json "**\TestExecution.json" --binding-assemblies "bin\Debug\net6.0\Company_com.dll" --include-test-output "All" --output "D:\Agent\_work\2\s\76140\FeatureData.json" --project-name "Web site testing" --project-language "en"
Error: Cannot find the specified testAssembly: D:\Agent\_work\2\s\bin\Debug\net6.0\Company_com.dll
 

Error: Cannot find the specified testAssembly: D:\Agent\_work\2\s\bin\Debug\net6.0\Company_com.dll

   at checkExecSyncError (child_process.js:629:11)
   at Object.execSync (child_process.js:666:13)
   at D:\Agent\_work\_tasks\SpecFlowPlus_32f3fe66-8bfc-476e-8e2c-9b4b59432ffa\0.6.964\index.js:138:46
   at step (D:\Agent\_work\_tasks\SpecFlowPlus_32f3fe66-8bfc-476e-8e2c-9b4b59432ffa\0.6.964\index.js:44:23)
   at Object.next (D:\Agent\_work\_tasks\SpecFlowPlus_32f3fe66-8bfc-476e-8e2c-9b4b59432ffa\0.6.964\index.js:25:53)
   at D:\Agent\_work\_tasks\SpecFlowPlus_32f3fe66-8bfc-476e-8e2c-9b4b59432ffa\0.6.964\index.js:19:71
   at new Promise (<anonymous>)
   at __awaiter (D:\Agent\_work\_tasks\SpecFlowPlus_32f3fe66-8bfc-476e-8e2c-9b4b59432ffa\0.6.964\index.js:15:12)
   at D:\Agent\_work\_tasks\SpecFlowPlus_32f3fe66-8bfc-476e-8e2c-9b4b59432ffa\0.6.964\index.js:77:12
   at Object.<anonymous> (D:\Agent\_work\_tasks\SpecFlowPlus_32f3fe66-8bfc-476e-8e2c-9b4b59432ffa\0.6.964\index.js:172:3)
##[debug]Processed: ##vso[task.issue type=error;]Error: Command failed: dotnet "D:\Agent\_work\_tasks\SpecFlowPlus_32f3fe66-8bfc-476e-8e2c-9b4b59432ffa\0.6.964\CLI\LivingDoc.CLI.dll" test-assembly "bin\Debug\net6.0\Company_com.dll" --output-type JSON --test-execution-json "**\TestExecution.json" --binding-assemblies "bin\Debug\net6.0\Company_com.dll" --include-test-output "All" --output "D:\Agent\_work\2\s\76140\FeatureData.json" --project-name "Web site testing" --project-language "en"
Error: Cannot find the specified testAssembly: D:\Agent\_work\2\s\bin\Debug\net6.0\Company_com.dll

   at checkExecSyncError (child_process.js:629:11)

I've tried numerous ways of formulating the path to get around this and in every case it is omiting the project directory name in the path. This is a self hosted agent so I have access to the server in question and can see the path in question. The only odd thing That I am doing that might account for this, though I couldn't say why, is forcing the use of dotNet Core 6.0. 

To do that I edited the LivingDoc.CLI.runtimeconfig.json as I wanted to run everything on the same .NET Core major version

{
 "runtimeOptions": {
   "tfm": "net6.0",
   "rollForward": "Major",
   "framework": {
     "name": "Microsoft.NETCore.App",
     "version": "6.0.1"
   }
 }
}