The default value for Company/Personal URL field in the new project wizard is http://. When you remove it to be empty it will tell you it is required, but leaving it to the default does not trigger any errors here.
But once the project is created and the Tiapp Editor opens, it will show an error in the XML-view.
See the attached screenshots
I'd expect the error to be raised in the new project wizard as well.
Also, I think this field should not be required and empty by default.