kotlin项目从gradle 8.*版本降低到gradle 6.*版本后启动app就崩溃问题。 原因就是没有安装kotlin插件。在gradle7开始的插件是org.jetbrains.kotlin.android；在gradle 6及一下的插件名字是kotlin-android
gradle和kotlin上的版本的坑慢慢踩！！！
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FATAL EXCEPTION: main Process: com.***.**app, PID: 10385 java.lang.RuntimeException: Unable to instantiate application com.***.**app.Application: java.lang.ClassNotFoundException: Didn't find class "com.***.**app.Application" on path: DexPathList[[zip file "/data/app/~~9NW3yxIXDTcfcsclmk3Xzg==/com.**.**app-aSgI_ieL4LNbqedBPxk_Hg==/base.apk"],nativeLibraryDirectories=[/data/app/~~9NW3yxIXDTcfcsclmk3Xzg==/com.**.**app-aSgI_ieL4LNbqedBPxk_Hg==/lib/arm64, /data/app/~~9NW3yxIXDTcfcsclmk3Xzg==/com.**.**app-aSgI_ieL4LNbqedBPxk_Hg==/base.apk!/lib/arm64-v8a, /system/lib64, /system_ext/lib64]] at android.app.LoadedApk.makeApplication(LoadedApk.java:1268) at android.app.ActivityThread.handleBindApplication(ActivityThread.java:6690) at android.app.ActivityThread.access$1300(ActivityThread.java:237) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1913) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:223) at android.app.ActivityThread.main(ActivityThread.java:7664) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
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