I just started using Titanium and I can't get the blank apps to open up the iOS Simulator

I just started using Titanium and I can't get the blank apps to open up
the iOS Simulator

I just started using Titanium (haven't even written any code yet), and
I've spent a while trying to get my simulators working. Android seems to
work, but I have to try and boot it up 3 times before it actually works
(then it is fine). iOS on the other hand just doesn't work.
I'm using Titanium 3.1.3.
I get the following messages in the console:
[INFO] : No module resources to copy
[INFO] : No CommonJS modules to copy
[INFO] : Compiling localization files
[INFO] : Skipping xcodebuild
[INFO] : Finished building the application in 13s 974ms
[INFO] : Running application in iOS Simulator
[INFO] : Launching application in iOS Simulator
[INFO] : Focusing the iOS Simulator
[INFO] : Application has exited from iOS Simulator
[INFO] : Project built successfully in 17s 497ms
Apparently there are no errors, but the simulator just doesn't pop up.
There are a few lines of code before all this I didn't include, but I
don't think those are important. Furthermore, I've looked all over the
internet and even Stackoverflow and I can't find a solution to my problem.