App crashes on screen rotation during starting the game

[neupanedipen]

Expected behavior

The app must be stable on screen rotation during starting the game.

Actual behavior

But the app crashes on screen rotation after clicking Okay during starting the game.

How to reproduce

1. Install the app and launch it.
   
2. Click on New game. Enter the plater name and click okay.
   
3. Click on start game. And click on Okay to add more players. On the next interface you'll be shown game information.
   
4. Now change the orientation of the screen to landscape mode.
   
5. Now click on okay in landscape mode.
   
   The app crashes.
   

• App Version: 1.0
  
• Device: Samsung Galaxy J5
  
• Operating System: Android 6.0.1
  

Recording Of The Bug

https://youtu.be/9Uz855aBDp8