2021-03-17 11:48:37.208 7788-7788/dev.flutter.multipleflutters E/AndroidRuntime: FATAL EXCEPTION: main
    Process: dev.flutter.multipleflutters, PID: 7788
    java.lang.RuntimeException: Unable to start activity ComponentInfo{dev.flutter.multipleflutters/dev.flutter.multipleflutters.DoubleFlutterActivity}: java.lang.IllegalStateException: Failed to spawn new JNI connected shell from existing shell.
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3492)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3652)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2099)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:233)
        at android.app.ActivityThread.main(ActivityThread.java:7892)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:656)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:967)
     Caused by: java.lang.IllegalStateException: Failed to spawn new JNI connected shell from existing shell.
        at io.flutter.util.Preconditions.checkState(Preconditions.java:52)
        at io.flutter.embedding.engine.FlutterJNI.spawn(FlutterJNI.java:342)
        at io.flutter.embedding.engine.FlutterEngine.spawn(FlutterEngine.java:383)
        at io.flutter.embedding.engine.FlutterEngineGroup.createAndRunEngine(FlutterEngineGroup.java:101)
        at dev.flutter.multipleflutters.EngineBindings.<init>(EngineBindings.kt:45)
        at dev.flutter.multipleflutters.DoubleFlutterActivity$topBindings$2.invoke(DoubleFlutterActivity.kt:17)
        at dev.flutter.multipleflutters.DoubleFlutterActivity$topBindings$2.invoke(DoubleFlutterActivity.kt:15)
        at kotlin.SynchronizedLazyImpl.getValue(LazyJVM.kt:74)
        at dev.flutter.multipleflutters.DoubleFlutterActivity.getTopBindings(Unknown Source:2)
        at dev.flutter.multipleflutters.DoubleFlutterActivity.onCreate(DoubleFlutterActivity.kt:58)
        at android.app.Activity.performCreate(Activity.java:8093)
        at android.app.Activity.performCreate(Activity.java:8067)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1309)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3465)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3652) 
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85) 
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) 
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2099) 
        at android.os.Handler.dispatchMessage(Handler.java:106) 
        at android.os.Looper.loop(Looper.java:233) 
        at android.app.ActivityThread.main(ActivityThread.java:7892) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:656) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:967) 

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel unknown, 2.0.2, on macOS 11.2.3 20D91 darwin-x64, locale
    zh-Hans-CN)
[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
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      To upgrade see
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[✓] Chrome - develop for the web
[✓] Android Studio (version 4.1)
[✓] IntelliJ IDEA Ultimate Edition (version 2018.3.5)
[!] Proxy Configuration
    ! NO_PROXY is not set
[✓] Connected device (3 available)