Useful or not, from you.
react-native React Native: java.lang.RuntimeException: Catalyst Instance has already disappeared: requested by WebSocketModule

Hello everyone, I do not use WebSocketModule but gives this error, please help.

Screenshot 2020-05-28 at 00 07 21

Screenshot 2020-05-28 at 00 06 25

That's a useful answer
Without any help

I'm having the same problem when setting up a project on a new RN 0.63 base:

2020-07-27 14:58:12.930 7877-7929/? E/unknown:ReactContextBaseJavaModule: Unhandled SoftException
    java.lang.RuntimeException: Catalyst Instance has already disappeared: requested by NativeAnimatedModule
        at com.facebook.react.bridge.ReactContextBaseJavaModule.getReactApplicationContextIfActiveOrWarn(ReactContextBaseJavaModule.java:67)
        at com.facebook.react.animated.NativeAnimatedModule.initialize(NativeAnimatedModule.java:128)
        at com.facebook.react.bridge.ModuleHolder.doInitialize(ModuleHolder.java:236)
        at com.facebook.react.bridge.ModuleHolder.create(ModuleHolder.java:201)
        at com.facebook.react.bridge.ModuleHolder.getModule(ModuleHolder.java:156)
        at com.facebook.react.bridge.JavaModuleWrapper.getModule(JavaModuleWrapper.java:56)
        at com.facebook.react.bridge.JavaModuleWrapper.getConstants(JavaModuleWrapper.java:126)
        at com.facebook.react.bridge.queue.NativeRunnable.run(Native Method)
        at android.os.Handler.handleCallback(Handler.java:883)
        at android.os.Handler.dispatchMessage(Handler.java:100)
        at com.facebook.react.bridge.queue.MessageQueueThreadHandler.dispatchMessage(MessageQueueThreadHandler.java:27)
        at android.os.Looper.loop(Looper.java:214)
        at com.facebook.react.bridge.queue.MessageQueueThreadImpl$4.run(MessageQueueThreadImpl.java:226)
        at java.lang.Thread.run(Thread.java:919)
2020-07-27 14:58:13.173 7877-7929/? E/ReactNativeJNI: logMarker RUN_JS_BUNDLE_END
2020-07-27 14:58:13.234 7877-7951/? E/unknown:ReactContextBaseJavaModule: Unhandled SoftException
    java.lang.RuntimeException: Catalyst Instance has already disappeared: requested by WebSocketModule
        at com.facebook.react.bridge.ReactContextBaseJavaModule.getReactApplicationContextIfActiveOrWarn(ReactContextBaseJavaModule.java:67)
        at com.facebook.react.modules.websocket.WebSocketModule.sendEvent(WebSocketModule.java:62)
        at com.facebook.react.modules.websocket.WebSocketModule.access$100(WebSocketModule.java:40)
        at com.facebook.react.modules.websocket.WebSocketModule$1.onOpen(WebSocketModule.java:156)
        at okhttp3.internal.ws.RealWebSocket$2.onResponse(RealWebSocket.java:210)
        at okhttp3.RealCall$AsyncCall.execute(RealCall.java:206)
        at okhttp3.internal.NamedRunnable.run(NamedRunnable.java:32)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.lang.Thread.run(Thread.java:919)

Note that I'm still using the default app code from npx react-native init project

I've just installed some modules so far...

My RN info:

$ npx react-native info
info Fetching system and libraries information...
System:
    OS: macOS Mojave 10.14.6
    CPU: (4) x64 Intel(R) Core(TM) i7-7567U CPU @ 3.50GHz
    Memory: 990.65 MB / 16.00 GB
    Shell: 3.2.57 - /bin/bash
  Binaries:
    Node: 14.1.0 - ~/.nvm/versions/node/v14.1.0/bin/node
    Yarn: 1.22.4 - /usr/local/bin/yarn
    npm: 6.14.4 - ~/.nvm/versions/node/v14.1.0/bin/npm
    Watchman: 4.9.0 - /usr/local/bin/watchman
  Managers:
    CocoaPods: 1.8.4 - /usr/local/bin/pod
  SDKs:
    iOS SDK:
      Platforms: iOS 13.2, DriverKit 19.0, macOS 10.15, tvOS 13.2, watchOS 6.1
    Android SDK:
      API Levels: 18, 23, 24, 25, 26, 27, 28, 29
      Build Tools: 23.0.1, 23.0.3, 25.0.0, 25.0.2, 25.0.3, 26.0.0, 26.0.1, 26.0.2, 26.0.3, 27.0.3, 28.0.2, 28.0.3, 29.0.0, 29.0.2
      System Images: a...google_apis | Google APIs Intel x86 Atom Sys..., a...google_apis | Google APIs Intel x86 Atom Sys..., a... | Intel x86 Atom_64, a...google_apis | Google APIs Intel x86 Atom Sys..., a...gle_apis | Google APIs Intel x86 Atom_64 ..., a...-28 | Intel x86 Atom, a... | Intel x86 Atom_64, a...google_apis | Google APIs Intel x86 Atom Sys..., a...-29 | Intel x86 Atom, a... | Intel x86 Atom_64, a...google_apis | Google APIs Intel x86 Atom Sys...
      Android NDK: 20.1.5948944
  IDEs:
    Android Studio: 3.5 AI-191.8026.42.35.5900203
    Xcode: 11.2.1/11B53 - /usr/bin/xcodebuild
  Languages:
    Java: 1.8.0_202-release - /usr/bin/javac
    Python: 2.7.16 - /usr/bin/python
  npmPackages:
    @react-native-community/cli: Not Found
    react: 16.13.1 => 16.13.1 
    react-native: 0.63.2 => 0.63.2 
  npmGlobalPackages:
    *react-native*: Not Found