I switched to basic profile permission, and got the same error still (unauthorized_scope_error:Scope). This error also popped up when I first tried to save as only profile, but later went away and appeared successful: unauthorized_scope_error:Scope r_liteprofile is not authorized for your application.
My screen did not look exactly like that when I was creating the app. However, when I tab over to the Products tab, Marketing Developer Platform is listed under Added Products.
Hope this extra information helps!