Xamarin Test cloud error on setup my app

Hi,

On my test code I setup my android app (developped with Xamarin).
I want to test my app with genymotion and I have a crash on this line:

app =
                    ConfigureApp.Android.ApkFile("my.apk")
                        .PreferIdeSettings()
                        .EnableLocalScreenshots()
                        .StartApp();

Here the output:

Signing apk with Xamarin keystore.
SetUp : System.InvalidOperationException : Sequence contains no elements
   at System.Linq.Enumerable.Single(IEnumerable1 source)
   at Xamarin.UITest.Shared.Android.Queries.QueryKeyStoreKeyType.ExtractKeyType(ProcessResult processResult)
   at Xamarin.UITest.Shared.Android.Queries.QueryKeyStoreKeyType.Execute(IProcessRunner processRunner, IJdkTools jdkTools)
   at Xamarin.UITest.Shared.Execution.Executor.<Execute>c__AnonStorey23.<>m__0()
   at Xamarin.UITest.Shared.Execution.Executor.WrapQuery(Func1 queryFunc)
   at Xamarin.UITest.Shared.Execution.Executor.Execute(IQuery3 query)
   at Xamarin.UITest.Shared.Android.KeyStore..ctor(IExecutor executor, FileInfo keyStoreFile, String keyAlias, String storePassword, String keyPassword)
   at Xamarin.UITest.Android.LocalAndroidAppInitializer.GetDefaultKeyStore(ArtifactFolder artifactFolder)
   at Xamarin.UITest.Android.LocalAndroidAppInitializer.PrepareApkFiles(IAndroidAppConfiguration appConfiguration, ArtifactFolder artifactFolder)
   at Xamarin.UITest.Android.AndroidApp..ctor(IAndroidAppConfiguration appConfiguration)
   at Xamarin.UITest.Configuration.AndroidAppConfigurator.StartApp(AppDataMode appDataMode)
   at Fols.Mobile.Tests.Droid.UnitTest1.SetUp() in UnitTest1.cs: line 19

Do you have any idea ??

Thanks