Link crash

Build version: 1.8.3.1
Build date: 1981-01-01 01:01:02
Current date: 2022-03-08 14:19:40
Device: Samsung SM-A025F
OS version: Android 11 (SDK 30)

Stack trace:
java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference
    at org.json.JSONTokener.nextCleanInternal(JSONTokener.java:121)
    at org.json.JSONTokener.nextValue(JSONTokener.java:98)
    at org.json.JSONObject.<init>(JSONObject.java:165)
    at org.json.JSONObject.<init>(JSONObject.java:182)
    at com.civix.link.Utilities.AppUtil.convertToMessageToMockMessage(AppUtil.kt:423)
    at com.civix.link.Screen.ChatScreen$getMessage$1.onSuccess(ChatScreen.kt:2200)
    at com.civix.link.Network.ApiHelper$postData$1.onResponse(ApiHelper.kt:361)
    at com.androidnetworking.common.ANRequest.deliverSuccessResponse(ANRequest.java:727)
    at com.androidnetworking.common.ANRequest.access$6500(ANRequest.java:80)
    at com.androidnetworking.common.ANRequest$6.run(ANRequest.java:709)
    at android.os.Handler.handleCallback(Handler.java:938)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:246)
    at android.app.ActivityThread.main(ActivityThread.java:8633)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130)

User actions:
2022-03-08 14:19:27: SplashScreen created
2022-03-08 14:19:27: SplashScreen resumed
2022-03-08 14:19:33: SplashScreen paused
2022-03-08 14:19:33: HomeScreen created
2022-03-08 14:19:34: HomeScreen resumed
2022-03-08 14:19:35: SplashScreen destroyed
2022-03-08 14:19:38: HomeScreen paused
2022-03-08 14:19:38: ChatScreen created
2022-03-08 14:19:38: ChatScreen resumed