You can add a related project to the sidebar, but this one won't appear in that projects sidebar as it usually does. If you try to manually add this project to the sidebar of another project it flashes up "error". I don't know why that is happening and it doesn't seem a common problem. I also don't know if there are other problems with the project but you can clearly add profiles to it.
I did click to report the project and it says this has already been reported.
I'm not sure if it is worth adding too much text and a lot more profiles to this project in case the only fix is to delete it and start again (or if it accidentally gets deleted while the back room staff try and fix things).