Task :processDebugResources Failed to execute aapt com.android.ide.common.process.ProcessException: Failed to execute aapt
at com.android.builder.core.AndroidBui
This resolved the issue for me...
Build|Clean project
Refactor|Remove unused resources
I am still a beginner at this so I cannot explain why this might have worked. It was an arbitrary choice on my part; it was simple, did not require detailed changes and I just thought it might help :)