Error MSB6006 when building Native Activity app

I'm following the "getting started" tutorial which guides you through setting up an Native Activity android app in Visual Studio (2013). However, when I start the emulator and build the app, I get the following error:

Error	 28	error MSB6006: "C:\Intel\INDE\IDEintegration\ANT\bin\ant.bat" exited with code 9020.	C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V120\Platforms\Android\Microsoft.Cpp.Android.targets	353	5	HelloWorld

Anyone familiar with this? I can't find anywhere how to solve this.

Hope someone can help me soon :)

Best regards, Marco Maissan