App keeps stopping

Discuss
1

Hello
My application suddenly started crashing, what is the solution?

ERROR " It’s an example, but exactly the same" :
error

TERMİNAL :

8447 28447 E AndroidRuntime: FATAL EXCEPTION: main
12-24 14:47:37.255 28447 28447 E AndroidRuntime: Process: com.xxxx.xxxxx, PID: 28447
12-24 14:47:37.255 28447 28447 E AndroidRuntime: com.google.appinventor.components.runtime.errors.YailRuntimeError: Value failed to convert from JSON.
12-24 14:47:37.255 28447 28447 E AndroidRuntime:        at com.google.appinventor.components.runtime.FirebaseDB.GotValue(SourceFile:519)
12-24 14:47:37.255 28447 28447 E AndroidRuntime:        at com.google.appinventor.components.runtime.FirebaseDB$3$1.run(SourceFile:487)
12-24 14:47:37.255 28447 28447 E AndroidRuntime:        at android.os.Handler.handleCallback(Handler.java:873)
12-24 14:47:37.255 28447 28447 E AndroidRuntime:        at android.os.Handler.dispatchMessage(Handler.java:99)
12-24 14:47:37.255 28447 28447 E AndroidRuntime:        at android.os.Looper.loop(Looper.java:214)
12-24 14:47:37.255 28447 28447 E AndroidRuntime:        at android.app.ActivityThread.main(ActivityThread.java:7156)
12-24 14:47:37.255 28447 28447 E AndroidRuntime:        at java.lang.reflect.Method.invoke(Native Method)
12-24 14:47:37.255 28447 28447 E AndroidRuntime:        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494)
12-24 14:47:37.255 28447 28447 E AndroidRuntime:        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:975)
2

I have no idea but I think it will help to find the answer if you say your android version, phone model and components and extensions used.
It would be still more helpful if you explain when the error happens and if you provide a sample .apk or .aia where is possible to reproduce the error.

3

@Ceday Please share the pictures of your screen 1 initialize blocks. Screen 1 appears to be in error, and you are using a Json file, I believe.