Launching Projekt on Android Error

If i Launch my game on my Phone (Galaxy S7, Android 7.0) i became this error:

> LogPlayLevel: BUILD FAILED
> LogPlayLevel:
> E:\DEV\android-sdk-windows\tools\ant\build.xml:649:
> The following error occurred while
> executing this line: LogPlayLevel:
> E:\DEV\android-sdk-windows\tools\ant\build.xml:694:
> null returned: 1 LogPlayLevel: Total
> time: 19 seconds LogPlayLevel:
> Program.Main: ERROR: AutomationTool
> terminated with exception:
> System.IO.FileNotFoundException: Die
> Datei "C:\Users\Paul\Documents\Unreal
> Projects\TowerFights\Intermediate/Android/APK/bin/TowerFights-debug.apk"
> konnte nicht gefunden werden.
> LogPlayLevel: Dateiname:
> "C:\Users\Paul\Documents\Unreal
> Projects\TowerFights\Intermediate/Android/APK/bin/TowerFights-debug.apk"
> LogPlayLevel:    bei
> System.IO.__Error.WinIOError(Int32
> errorCode, String maybeFullPath)
> LogPlayLevel:    bei
> System.IO.File.InternalCopy(String
> sourceFileName, String destFileName,
> Boolean overwrite, Boolean checkHost)
> LogPlayLevel:    bei
> UnrealBuildTool.UEDeployAndroid.MakeApk(AndroidToolChain
> ToolChain, String ProjectName, String
> ProjectDirectory, String OutputPath,
> String EngineDirectory, Boolean
> bForDistribution, String CookFlavor,
> Boolean bMakeSeparateApks, Boolean
> bIncrementalPackage, Boolean
> bDisallowPackagingDataInApk, Boolean
> bDisallowExternalFilesDir)
> LogPlayLevel:    bei
> UnrealBuildTool.UEDeployAndroid.PrepForUATPackageOrDeploy(FileReference
> ProjectFile, String ProjectName,
> String ProjectDirectory, String
> ExecutablePath, String
> EngineDirectory, Boolean
> bForDistribution, String CookFlavor,
> Boolean bIsDataDeploy) LogPlayLevel:  
> bei
> AndroidPlatform.Deploy(ProjectParams
> Params, DeploymentContext SC)
> LogPlayLevel:    bei
> Project.Deploy(ProjectParams Params)
> LogPlayLevel:    bei
> BuildCookRun.DoBuildCookRun(ProjectParams
> Params) LogPlayLevel:    bei
> BuildCookRun.ExecuteBuild()
> LogPlayLevel:    bei
> AutomationTool.BuildCommand.Execute()
> LogPlayLevel:    bei
> AutomationTool.Automation.Execute(List`1
> CommandsToExecute,
> CaselessDictionary`1 Commands)
> LogPlayLevel:    bei
> AutomationTool.Automation.Process(String[]
> Arguments) LogPlayLevel:    bei
> AutomationTool.Program.MainProc(Object
> Param) LogPlayLevel:    bei
> AutomationTool.InternalUtils.RunSingleInstance(Func`2
> Main, Object Param) LogPlayLevel:   
> bei AutomationTool.Program.Main()

LogPlayLevel: Program.Main:
AutomationTool exiting with ExitCode=1
(Error_Unknown) LogPlayLevel:
Completed Launch On Stage: Deploy
Task, Time: 72.547984 LogPlayLevel:
BUILD FAILED PackagingResults:Error:
Error Launch failed! Unknown Error
LogSlate: Took 0.000146 seconds to
synchronously load lazily loaded font
‘…/…/…/Engine/Content/Editor/Slate/Fonts/DroidSansMono.ttf’
(77K)