I submitted my app to the App Store yesterday; everything ran as it should. This morning, I upgraded Java, (not sure this has anything to do with the issue, just thought I would mention it). Now, I can’t run my app in XCode 4 on any simulator or iPhone!
This is the error I’m getting:

I have looked at all of the Google and SO issues dealing with this; most are involved with OS x. This is only happening on iOS. My iPhone is iOS 5.1, as is the simulator. I have all settings for target OS set to 5.0. I am running XCode 4.4.1. I tried a different app, and it runs, no problems.
Anybody have any suggestions of what else to look at to fix this?
I made a new app, with just bare bones files in it (main.m, info.plist and Prefix.pch). Then I copied the existing files (with the exception of the 3 files above) from the app which wasn’t working, and it now runs just fine.