Error when building the game in unity 2020.3.17f1, what should I do?

Question

Unity

When building the game on Android, the error
Failed to update Android SDK package list appears. See the console for details.
In console 4 errors

first error:
Exception in thread "main" java.lang.NoClassDefFoundError: com/google/common/collect/Multimap
at com.android.sdklib.tool.sdkmanager.SdkManagerCliSettings.(SdkManagerCliSettings.java:65)
at com .android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:57)
at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:48)
Caused by: java.lang.ClassNotFoundException: com .google.common.collect.Multimap
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 3 more
Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8

UnityEngine .GUIUtility:ProcessEvent (int,intptr,bool&)

second error:
CommandInvokationFailure: Failed to update Android SDK package list.
D:\UnityI\2020.3.17f1\Editor\Data\PlaybackEngines\AndroidPlayer\SDK\tools\bin\sdkmanager.bat --list

stderr[
Exception in thread "main" java.lang.NoClassDefFoundError: com/google/common/collect /Multimap
at com.android.sdklib.tool.sdkmanager.SdkManagerCliSettings.(SdkManagerCliSettings.java:65)
at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:57)
at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:48)
Caused by: java.lang.ClassNotFoundException: com.google.common.collect.Multimap
at java.net.URLClassLoader.findClass(URLClassLoader. java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357 )
... 3 more
Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8
]
stdout[

]
exit code: 1
UnityEditor.Android.Command.WaitForProgramToRun (UnityEditor.Utils.Program p, UnityEditor.Android.Command+WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg) (at :0)
UnityEditor.Android.Command.Run (System.Diagnostics.ProcessStartInfo psi, UnityEditor.Android.Command+WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg) (at :0)
UnityEditor.Android.AndroidSDKTools.RunAndroidSdkTool (System.String toolName, System.String arguments, System.Boolean updateCommand, System.String errorMsg, System.String toolsDir, System.String[] warningsToIgnore) (at :0)
UnityEditor.Android.AndroidSDKTools.ListComponentsVersions () (at :0)
UnityEditor.Android.SDKManager.UpdatePackagesList () (at :0)
UnityEditor.Android.SDKManager.HighestVersionInstalled (UnityEditor.Android.SDKManager+Component tool) (at :0)
UnityEditor.Android.PostProcessor.Tasks.CheckAndroidSDK+SDKToolsDetector.GetVersion () (at :0)
UnityEditor.Android.PostProcessor.Tasks.CheckAndroidSDK+SDKComponentDetector.Detect (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.Execute (UnityEditor.Android.PostProcessor.PostProcessorContext context) (at :0)
UnityEditor.Android.PostProcessor. PostProcessRunner.RunAllTasks (UnityEditor.Android.PostProcessor.PostProcessorContext context) (at :0)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&)

third error:
Build completed with a result of 'Failed' in 59 seconds (58609 ms)
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)

fourth error:
UnityEditor.BuildPlayerWindow+BuildMethodException: 3 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&)

I've already reinstalled Unity 5 times , what to do?
(Maybe this will not help, but at the beginning of the installation in all 5 attempts there was a type error - it was not possible to remove the old versions of Android Build)

Answer 1

Go to edit/preferences and uncheck all SDK related checkboxes, then wait 10 seconds and check all checkboxes again. The Internet is full of answers on the same topic.