Editor Utility Widgets Feedback

I downloaded your project zip from Github, and I add the starter content into that project. But when I open the project, it says Failed to load map!
…/…/…/…/…/…/Users/PC/Desktop/EdUtilExamples-master/Content/Maps/Welcome.umap appears to be an asset file.
nothing I can find in the content folder but 2 folders with none files. Then I create a project with the starter content, migrate the content from your project to my new project. Nothing works still.