Xamarin.UITests Android Device Not Detected or Not Working

I can't run Xamarin.UITests on any Android simulator/emulator. Any suggestions? I get the following errors when I try:

Google Emulator:

SetUp: System.Exception: Unable to run on a physical device without activation. The full version is available for Xamarin Test Cloud customers, for more information contact [email protected] If you are already a Xamarin Test Cloud customer, you can provide your api in one of the following ways: * Adding it ConfigureApp using the ApiKey method * Setting the XTC_API_KEY environment variable * Adding the following attribute to your Properties/AssemblyInfo.cs file: [assembly: Xamarin.UITest.TestCloudApiKey(YOUR_API_KEY)] * Place an xtc_api-key file containing your api key in an upstream directory from the test assembly

Xamarin Android Player:

SetUp: System.Exception: No devices connected

GenyMotion:

SetUp : System.Exception : Failed to execute: /users/erikandersen/Library/Developer/Xamarin/android-sdk-macosx/platform-tools/adb devices - exit code: 1 cannot bind 'tcp:5037' ADB server didn't ACK * failed to start daemon * error: adb server is out of date. Killing…

After updated GenyMotion to 2.3.1, I now get the following error:

SetUp: System.Exception: App Installation failed with output: 12050 KB/s (11199602 bytes in 0.907s) pkg: /data/local/tmp/final-xxxxxx.apk Failure [INSTALL_FAILED_CPU_ABI_INCOMPATIBLE]

NUnit Code

    AndroidApp _app;
    public string PathToAPK { get; set; }

    [TestFixtureSetUp]
    public void BeforeAll ()
    {
        var path = new Uri(Assembly.GetExecutingAssembly().CodeBase).LocalPath;
        var info = new FileInfo(path);
        var directory = info.Directory.Parent.Parent.Parent.FullName;

        PathToAPK = Path.Combine(directory, "Android", "bin", "Debug", "Demo.Android.apk");
    }

    [SetUp]
    public void BeforeEach ()
    {
        _app = ConfigureApp.Android.ApkFile (PathToAPK).StartApp ();
    }

    [Test]
    public void TestInvalidEmail ()
    {
        _app.EnterText (c => c.Class ("UITextField"), "");
    }

TestInvalidEmail() is never called because NUnit fails on

_app = ConfigureApp.Android.ApkFile (PathToAPK).StartApp ();

Background:

I'm using Xamarin.UITests for an iOS/Android application I'm developing and we're having issues with the Android side of things. iOS works fine. I've written each test twice, once in C# and once in Ruby using calabash, in order to isolate the issue. Calabash works fine, but any C# NUnit Test Project fails to connect to any emulator I try launching.

What I've tried:

1. Making sure an emulator is already running before I run the tests
2. Making sure only 1 emulator is running
3. Restarting the adb server
4. Trying multiple types of emulators (i.e. Xamarin Android Player, Gennymotion, and the Google Emulator)