While Publishing my Test Automation Project to Orchestrator I am getting the error *Value cannot be null parameter 'version'

I have connected my studio, orchestrator, Assistant to the required account. when i am publishing my library project i am able to publish to the orchestrator. But when I’m trying to publish my Test Automation Project to the same orchestrator tenant i am unable to publish and getting the following error attached in the screenshot. Kindly provide solution to get rid of the issue.


Can you click on open logs or details and show the full execution logs here please


hi @Anil_G kindly find the logs screenshot attached.


please delete the project.json and reopen the project and check


I have the same problem. In my case, I am trying to publish a custom library that uses two other custom libraries I have developed. I can publish a blank library but if I import either of the other two libraries, I receive the same error as Chakravarthi Koppuravuri.

This is a new library developed entirely in Studio 2023.10.0.


Value cannot be null. (Parameter ‘version’)

Error: System.ArgumentNullException: Value cannot be null. (Parameter ‘version’)
at UiPath.NuGet.Package…ctor(String id, String version)
at UiPath.Studio.ProjectPackager.Publish.Services.ProjectDependenciesProvider.<>c.b__2_0(PackageDependencyState r)
at System.Linq.Enumerable.SelectEnumerableIterator2.ToArray() at System.Linq.Enumerable.ToArray[TSource](IEnumerable1 source)
at UiPath.Studio.ProjectPackager.Publish.Services.RuntimeDependencyService.GetRuntimeProjectItems(IEnumerable1 runtimeDependencies, IEnumerable1 dependencies)
at UiPath.Studio.ProjectPackager.Publish.Services.RuntimeDependencyService.HasLegacyPackage(IEnumerable1 runtimeDependencies, IEnumerable1 dependencies)
at UiPath.Studio.ProjectPackager.Publish.Services.RuntimeDependencyService.GetRuntimeDependencies(IEnumerable1 dependencies, IEnumerable1 allPackages)
at UiPath.Studio.ProjectPackager.Publish.Services.RuntimeDependencyService.GetRuntimeDependencies(IWorkflowProjectModel workflowProjectModel)
at UiPath.Studio.ProjectPackager.Publish.Services.ProcessPublishProcessor.CloneWorkflowProject(IWorkflowProjectModel projectModel)
at UiPath.Studio.ProjectPackager.Publish.Services.PublishProcessor.SetupAsync(IWorkflowProjectModel projectModel, ProjectPublishSettings settings)
at UiPath.Studio.ProjectPackager.Publish.Services.ProjectPublishProcessor.SetupAsync(IWorkflowProjectModel projectModel, ProjectPublishSettings settings)
at UiPath.Studio.ProjectPackager.Publish.Services.ProcessPublishProcessor.SetupAsync(IWorkflowProjectModel projectModel, ProjectPublishSettings settings)
at UiPath.Studio.ProjectPackager.Publish.Services.PublishService.PublishAsync(IWorkflowProjectModel projectModel, IPublishSettings settings), HResult -2147467261

Kindly validate the project for errors. Please try publishing after you clear those errors. @Chakravarthi_Koppuravuri

My project validates with no errors. The “Value Cannot be null” error only appears once Studio attempts to publish the project.

I opened my project in Studio 2023.4.5 and was able to publish it with no errors.