编译安卓apk，出现了Failed to Copy File 的问题

IOException: Failed to Copy File / Directory from 'D:\ar\Editor\Data\PlaybackEngines\AndroidPlayer\Variations\mono\Release\Libs\armeabi-v7a' to 'Temp/StagingArea\libs\armeabi-v7a'.
UnityEditor.Android.PostProcessor.Tasks.PrepareUnityPackage.PrepareNativeUnityLibs (UnityEditor.Android.PostProcessor.PostProcessorContext context, System.String abi)
UnityEditor.Android.PostProcessor.Tasks.PrepareUnityPackage.Execute (UnityEditor.Android.PostProcessor.PostProcessorContext context)
UnityEditor.Android.PostProcessor.PostProcessRunner.RunAllTasks (UnityEditor.Android.PostProcessor.PostProcessorContext context)
UnityEditor.Android.PostProcessAndroidPlayer.PostProcess (BuildTarget target, System.String stagingAreaData, System.String stagingArea, System.String playerPackage, System.String installPath, System.String companyName, System.String productName, BuildOptions options, UnityEditor.RuntimeClassRegistry usedClassRegistry)
UnityEditor.Android.AndroidBuildPostprocessor.PostProcess (BuildPostProcessArgs args)
UnityEditor.PostprocessBuildPlayer.Postprocess (BuildTargetGroup targetGroup, BuildTarget target, System.String installPath, System.String companyName, System.String productName, Int32 width, Int32 height, System.String downloadWebplayerUrl, System.String manualDownloadWebplayerUrl, BuildOptions options, UnityEditor.RuntimeClassRegistry usedClassRegistry, UnityEditor.BuildReporting.BuildReport report) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/PostprocessBuildPlayer.cs:186)
UnityEditor.HostView:OnGUI()

出现了这个错误