your error message is DX execution failed
here is SteveJG’s monster list of things to check https://groups.google.com/d/msg/mitappinventortest/fLiMEfPh09Q/1Ia0AaQEXogJ
each point on the monster list might be the issue, why someone gets a DX execution failed error… that thread is a collection of several possibilities, which have been collected by SteveJG during the years while answering questions like that… hope that helps…
Have you looked at that advice? It discusses many strange things that can cause headaches.
Do you have an aia file of your Project from a time prior to having the DX execution error?
What happens if you attempt to compile that aia? If it compiles nicely, ask yourself how you have changed the Project since. Even small changes can cause an issue. Did you perhaps change your app icon recently? Many developers have an issue when they do that.
(Credits Taifun/SteveJG)