I have read https://docs.microsoft.com/en-us/vsts/organizations/settings/work/manage-process?toc=%2Fvsts%2Fwork%2Fcustomize%2Ftoc.json&bc=%2Fvsts%2Fwork%2Fcustomize%2Fbreadcrumb%2Ftoc.json&view=vsts#change-the-process-used-by-a-project and I deleted ALL work items in my existing Scrum project. Now I want to switch it to use Agile process, but the option in the endpoint visualstudio.com/_settings/process?_a=all is presenting a dialog box saying "There are currently no projects available to change to the Agile process."
Had anyone achieved it before?