Execution failed app:processDebugResources Android Studio

For me it helped to change the version of buildTools to:

buildToolsVersion "21.0.1"

You will find this setting inside the file app/build.gradle.

You're hitting bug https://code.google.com/p/android/issues/detail?id=42752. The cause usually seems to be a reference to a nonexistent string in one of your menu resources.

For me it was that I forgot to install the 32bit dependencies:

sudo apt-get install -y lib32gcc1 libc6-i386 lib32z1 lib32stdc++6
sudo apt-get install -y lib32ncurses5 lib32gomp1 lib32z1-dev lib32bz2-dev