UiPath Activity Creator - Import JSON file error

Hi there,

I am trying to create a custom activity using visual studio extension (Activity Creator). But I couldn’t do that by importing a JSON file. I am getting error “project.json is invalid”.
Reference: “project.json” file is taken from library project of UiPath solution.

Can anyone suggests, what could be the reason for this error. or this extension is not compatible for import JSON file.

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Might be some packages are missing from .nuget packages. but below link will help you how to create a custom activity for your requirement.