App crashing when tried to Input unicode Nickname ..

[RageshAntony]

I tried to input Unicode Nickname (in Tamil Language ). The App crashed

LOG::

2019-01-23 18:14:01.441 3799-3805/com.github.nkzawa.socketio.androidchat I/zygote64: Increasing code cache capacity to 512KB
2019-01-23 18:14:07.667 3799-3799/com.github.nkzawa.socketio.androidchat D/AndroidRuntime: Shutting down VM
2019-01-23 18:14:07.669 3799-3799/com.github.nkzawa.socketio.androidchat E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.github.nkzawa.socketio.androidchat, PID: 3799
    java.lang.RuntimeException: Unable to resume activity {com.github.nkzawa.socketio.androidchat/com.github.nkzawa.socketio.androidchat.MainActivity}: java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=65536, result=-1, data=Intent { (has extras) }} to activity {com.github.nkzawa.socketio.androidchat/com.github.nkzawa.socketio.androidchat.MainActivity}: java.lang.IllegalStateException: Fragment MainFragment{501b6dc #1 id=0xffffffff} not attached to Activity
        at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3584)
        at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3624)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2865)
        at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4702)
        at android.app.ActivityThread.-wrap18(Unknown Source:0)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1598)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6518)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
     Caused by: java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=65536, result=-1, data=Intent { (has extras) }} to activity {com.github.nkzawa.socketio.androidchat/com.github.nkzawa.socketio.androidchat.MainActivity}: java.lang.IllegalStateException: Fragment MainFragment{501b6dc #1 id=0xffffffff} not attached to Activity
        at android.app.ActivityThread.deliverResults(ActivityThread.java:4271)
        at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3556)
        at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3624) 
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2865) 
        at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4702) 
        at android.app.ActivityThread.-wrap18(Unknown Source:0) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1598) 
        at android.os.Handler.dispatchMessage(Handler.java:106) 
        at android.os.Looper.loop(Looper.java:164) 
        at android.app.ActivityThread.main(ActivityThread.java:6518) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807) 
     Caused by: java.lang.IllegalStateException: Fragment MainFragment{501b6dc #1 id=0xffffffff} not attached to Activity
        at android.support.v4.app.Fragment.getResources(Fragment.java:651)
        at com.github.nkzawa.socketio.androidchat.MainFragment.onActivityResult(MainFragment.java:186)
        at android.support.v4.app.FragmentActivity.onActivityResult(FragmentActivity.java:167)
        at android.app.Activity.dispatchActivityResult(Activity.java:7280)
        at android.app.ActivityThread.deliverResults(ActivityThread.java:4267)
        at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3556) 
        at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3624) 
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2865) 
        at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4702) 
        at android.app.ActivityThread.-wrap18(Unknown Source:0) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1598) 
        at android.os.Handler.dispatchMessage(Handler.java:106) 
        at android.os.Looper.loop(Looper.java:164) 
        at android.app.ActivityThread.main(ActivityThread.java:6518) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)