errors with android sdk

when I put the api from 21 to 30, the inscription android sdk is missing required platform api required api level 30 appears on the screen when you click update android sdk, a bunch of errors and one warning fly out 1) File C:\Users\RYZEN.android\repositories.cfg could not be loaded. UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)

2)Win32Exception: ApplicationName='powershell', CommandLine='-ExecutionPolicy Bypass -File "C:/Unity Hub/2020.3.22f1/Editor/Data/PlaybackEngines/AndroidPlayer/Tools\RunElevatedCommand.ps1" -ArgumentList Ignored "C:\Unity Hub\2020.3.22f1\Editor\Data\PlaybackEngines\AndroidPlayer\SDK\tools\bin\sdkmanager.bat" ""platforms;android-30"" "C:\Unity Hub\My project\Temp\AndroidSDKTool"', CurrentDirectory='', Native error= The specified file cannot be found.

System.Diagnostics.Process.StartWithCreateProcess (System.Diagnostics.ProcessStartInfo startInfo) (at :0) System.Diagnostics.Process.Start () (at :0) (wrapper remoting-invoke-with-check) System.Diagnostics.Process.Start() UnityEditor.Android.AndroidSDKTools.RunAndroidSdkToolElevatedWindowsInternal (System.String elevatedCommandPath, System.String toolName, System.String arguments, System.String errorMsg, System.String toolsdir) (at :0) UnityEditor.Android.AndroidSDKTools.RunAndroidSdkToolElevatedWindows (System.String toolName, System.String arguments, System.String errorMsg) (at :0) UnityEditor.Android.AndroidSDKTools.InstallPlatform (System.Int32 apiLevel) (at :0) UnityEditor.Android.PostProcessor.Tasks.CheckAndroidSDK+SDKPlatformDetector.Update (UnityEditor.Android.AndroidSDKTools sdkTools, System.Version minVersion, UnityEditor.Android.PostProcessor.ProgressHandler onProgress) (at :0) UnityEditor.Android.PostProcessor.Tasks.CheckAndroidSDK.EnsureSDKComponentVersion (System.Version minVersion, UnityEditor.Android.PostProcessor.Tasks.CheckAndroidSDK+SDKComponentDetector detector) (at :0) UnityEditor.Android.PostProcessor.Tasks.CheckAndroidSDK.EnsureSDKComponentVersion (System.Int32 minVersion, UnityEditor.Android.PostProcessor.Tasks.CheckAndroidSDK+SDKComponentDetector detector) (at :0) UnityEditor.Android.PostProcessor.Tasks.CheckAndroidSDK.Execute (UnityEditor.Android.PostProcessor.PostProcessorContext context) (at :0) UnityEditor.Android.PostProcessor.PostProcessRunner.RunAllTasks (UnityEditor.Android.PostProcessor.PostProcessorContext context) (at :0) UnityEditor.Android.PostProcessAndroidPlayer.PrepareForBuild (UnityEditor.BuildOptions options, UnityEditor.BuildTarget target) (at :0) UnityEditor.Android.AndroidBuildPostprocessor.PrepareForBuild (UnityEditor.BuildOptions options, UnityEditor.BuildTarget target) (at :0) UnityEditor.PostprocessBuildPlayer.PrepareForBuild (UnityEditor.BuildOptions options, UnityEditor.BuildTargetGroup targetGroup, UnityEditor.BuildTarget target) (at :0) UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&)

3)Error building Player: Win32Exception: ApplicationName='powershell', CommandLine='-ExecutionPolicy Bypass -File "C:/Unity Hub/2020.3.22f1/Editor/Data/PlaybackEngines/AndroidPlayer/Tools\RunElevatedCommand.ps1" -ArgumentList Ignored "C:\Unity Hub\2020.3.22f1\Editor\Data\PlaybackEngines\AndroidPlayer\SDK\tools\bin\sdkmanager.bat" ""platforms;android-30"" "C:\Unity Hub\My project\Temp\AndroidSDKTool"', CurrentDirectory='', Native error= The specified file cannot be found.

4)Build completed with a result of 'Failed' in 157 seconds (157054 ms) UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)

5)UnityEditor.BuildPlayerWindow+BuildMethodException: 2 errors at UnityEditor.BuildPlayerWindow+DefaultBuildMethods.BuildPlayer (UnityEditor.BuildPlayerOptions options) [0x002ca] in :0 at UnityEditor.BuildPlayerWindow.CallBuildMethods (System.Boolean askForBuildLocation, UnityEditor.BuildOptions defaultBuildOptions) [0x00080] in :0 UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)