Androidビルド時のエラー表示に関して

##実現したい事
Android端末にBuild And Runを実行することでAPKファイルを作成して、
実機で操作できるようにしたい。

##現状起きているエラー
以下の3つが今表示されてしまっているエラーになります。

CommandInvokationFailure: Unable to list target platforms. Please make sure the android sdk path is correct. 
C:\Users\aest-training\AppData\Local\Android\sdk\tools\bin\avdmanager.bat list target -c

stderr[
Exception in thread "main" java.lang.NoSuchMethodError: com.android.prefs.AndroidLocation.getAvdFolder()Ljava/lang/String;
	at com.android.sdklib.tool.AvdManagerCli.init(AvdManagerCli.java:278)
	at com.android.sdklib.tool.AvdManagerCli.run(AvdManagerCli.java:210)
	at com.android.sdklib.tool.AvdManagerCli.main(AvdManagerCli.java:200)
]
stdout[
]
exit code: 1
UnityEditor.Android.Command.WaitForProgramToRun (UnityEditor.Utils.Program p, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg)
UnityEditor.Android.Command.Run (System.Diagnostics.ProcessStartInfo psi, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg)
UnityEditor.Android.AndroidSDKTools.RunAndroidSdkTool (System.String toolName, System.String arguments, Boolean updateCommand, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg)
UnityEditor.Android.AndroidSDKTools.ListTargetPlatforms (UnityEditor.Android.AndroidJavaTools javaTools)
UnityEditor.Android.AndroidSDKTools.GetTopAndroidPlatformAvailable (UnityEditor.Android.AndroidJavaTools javaTools)
UnityEditor.Android.PostProcessor.Tasks.CheckAndroidSDK+SDKPlatformDetector.GetVersion (UnityEditor.Android.AndroidSDKTools sdkTools, UnityEditor.Android.AndroidJavaTools javaTools)
UnityEditor.Android.PostProcessor.Tasks.CheckAndroidSDK+SDKComponentDetector.Detect (UnityEditor.Android.AndroidSDKTools sdkTools, UnityEditor.Android.AndroidJavaTools javaTools, System.Version minVersion, UnityEditor.Android.PostProcessor.ProgressHandler onProgress)
UnityEditor.Android.PostProcessor.Tasks.CheckAndroidSDK.EnsureSDKComponentVersion (UnityEditor.Android.AndroidJavaTools javaTools, System.Version minVersion, UnityEditor.Android.PostProcessor.Tasks.SDKComponentDetector detector)
UnityEditor.Android.PostProcessor.Tasks.CheckAndroidSDK.EnsureSDKComponentVersion (UnityEditor.Android.AndroidJavaTools javaTools, Int32 minVersion, UnityEditor.Android.PostProcessor.Tasks.SDKComponentDetector detector)
UnityEditor.Android.PostProcessor.Tasks.CheckAndroidSDK.Execute (UnityEditor.Android.PostProcessor.PostProcessorContext context)
UnityEditor.Android.PostProcessor.PostProcessRunner.RunAllTasks (UnityEditor.Android.PostProcessor.PostProcessorContext context)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

Build completed with a result of 'Failed'
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

UnityEditor.BuildPlayerWindow+BuildMethodException: 2 errors
  at UnityEditor.BuildPlayerWindow+DefaultBuildMethods.BuildPlayer (BuildPlayerOptions options) [0x0021f] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:187 
  at UnityEditor.BuildPlayerWindow.CallBuildMethods (Boolean askForBuildLocation, BuildOptions defaultBuildOptions) [0x0007f] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:94 
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

##試してみたこと
複数のサイトで「SDK Tool」のバージョンがUnityと合致していない、といったような内容があったので過去のバージョンをインストールしてみたのですが上手く行きませんでした。
以上となります。何卒、よろしくお願い致します。