Bug Pathway error: Junior Programmer

Using Firefox, Chrome, Edge. The submission step of the Counting Prototype tutorial in the Junior Programmer pathway is bugged. The page will not allow you to paste, type out or submit a Unity Play URL to your own project. There have been 89 comments on this within the past two years, most of which are complaining about the bug. The error reads "project_unsupported_url" - Is there any way to fix this?

Edit: I was able to complete the submission to advance the course by uploading the above image of the error message in place of my project.