Error code 14 - "Building the android package failed!"

[ennoente]

Hey all,

I wanted to deplay "maroon", an example to the Google Nexus S-Emulator.
But all i get is "Building the android package failed!" and that I should run it again with "--verbose"
for more information.
Also it says "Fehler beim Erstellen/Deployment des Projekts maroon (Kit: Android für armeabi-v7a (GCC 4.8, Qt 5.3.2))", which means like "Error while Building/Deploying the project marron (Kit: Android für armeabi-v7a (GCC 4.8, Qt 5.3.2))"
Do you know how I can solve this? The error came when I installed lower Android version with lower
API-levels because I have a very old phone.

Thanks for every help!
Enno