Could not build build game into windows phone 8.1

Hi, I can't build my application into my windows phone 8.1. My unity version is 2017.3.1f1 and I already installed the SDK for 8.1 and UWP.. Target device is mobile and build and run on Windows Phone. The build will say Succeed in console but no app will be deployed in my phone. Whenever I build it's throwing me an error that I can't understand.

Exception: Deployment failed. Output: [18:40:43.378] Windows Phone Player Runner started. [18:40:43.436] An error occurred while running: The type initializer for 'WindowsPhonePlayerRunner.Program' threw an exception. at WindowsPhonePlayerRunner.Program.Main(String[] args) [18:40:43.436] Exiting Windows Phone Player Runner.

ApplicationLauncherImpl.RunOnPhone (System.String commandLine) (at C:/buildslave/unity/build/PlatformDependent/MetroPlayer/Extensions/Managed/ApplicationLauncher.cs:208) ApplicationLauncherImpl.Run (.VisualStudio vs) (at C:/buildslave/unity/build/PlatformDependent/MetroPlayer/Extensions/Managed/ApplicationLauncher.cs:170) ApplicationLauncher.BuildAndRunOnSingle (BuildLaunchPlayerArgs args, WSABuildAndRunDeployTarget deployTarget, .VisualStudio vs) (at C:/buildslave/unity/build/PlatformDependent/MetroPlayer/Extensions/Managed/ApplicationLauncher.cs:50) ApplicationLauncher.BuildAndRun (BuildLaunchPlayerArgs args) (at C:/buildslave/unity/build/PlatformDependent/MetroPlayer/Extensions/Managed/ApplicationLauncher.cs:36) UnityEditor.WSA.BuildPostprocessor.LaunchPlayer (BuildLaunchPlayerArgs args) (at C:/buildslave/unity/build/PlatformDependent/MetroPlayer/Extensions/Managed/ExtensionModule.cs:109) UnityEditor.PostprocessBuildPlayer.Launch (BuildTargetGroup targetGroup, BuildTarget buildTarget, System.String path, System.String productName, BuildOptions options, UnityEditor.BuildReporting.BuildReport buildReport) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/PostprocessBuildPlayer.cs:225) UnityEditor.BuildPlayerWindow:BuildPlayerAndRun()