How Do I Upload An Entire Project & Assets?

Hi,
I’m trying to find out how to upload and host a project (see screenshot below) at PlayCanvas, but the Help tutorial on Uploading & Importing doesn’t seem helpful–drag and drop doesn’t appear to function and I can’t find an “Upload” button anywhere.

If you are importing a project, please follow: https://developer.playcanvas.com/en/user-manual/profile/projects/#import-project-archive