You could try clicking the share link if you happened to save it somewhere else before you accidentally deleted or lost your project. I had this happen to me a year ago when i hit delete thinking it would just be the new section but lost the whole project. I just found the link in an old folder, clicked on it and it took me to my old project in view mode; authored by me but no way for me to reclaim it. You could try logging out of your account and follow the original link to at least recover the view page? That then gives you a way to rebuild it but seems you are unable to sign in and claim it from the view.
You could try clicking the share link if you happened to save it somewhere else before you accidentally deleted or lost your project. I had this happen to me a year ago when i hit delete thinking it would just be the new section but lost the whole project. I just found the link in an old folder, clicked on it and it took me to my old project in view mode; authored by me but no way for me to reclaim it. You could try logging out of your account and follow the original link to at least recover the view page? That then gives you a way to rebuild it but seems you are unable to sign in and claim it from the view.