"You are not allowed to remove the Unity splash screen from your game", but I didn't

Hello,

I'm compiling an Xcode project from Unity for the first time. It builds, but it hangs with the following error message when I run it:

"You are using Unity iPhone Basic. You are not allowed to remove the Unity splash screen from your game"

Which would be fair enough, but I didn't do anything to the splash screens at all. :(

I did a Google search for the answer to the above. Every thread on this subject seems to be from 2012, implying that this may be a recurrence of a previously-existing bug?

I did a bit more investigation on the project itself, and it looks like the project is generated with four of the splash screens missing (Portrait Non-Retina, Portrait Retina, Landscape Non-Retina, and Landscape Retina). Could this be related? Does anyone have the four missing splash screens that I can just drop in to make the project run?

I'm using Unity 4.3.4 and Xcode 5.1.1 with the latest iOS SDK.