The App Crashes On Trying To Set A Song As Ringtone

Expected behavior

The app should be able to set the selected song as ringtone and shouldn't crash on the operation.

Actual behavior

When I try to set any song as ringtone the app crashes.

How to reproduce

1. Install the app from Play store.
   
2. Launch the app.
   
3. On the overview page click on three vertical dots in the interface similar as below.
   
4. Click on the three verticle dots present on the interface and select Setup scan directory. Now choose the folder with the audio files and click on refresh button.
   
5. Once the audio file have appeared, select the file and click on Select and close.
   
6. Now play the audio file and click on the three vertical dots present on the player. And select Set current track as ringtone? Option and the app will crash here.
   
   

• App Version: 1.1.7
  
• Operating System: Android 6.0.1
  
• Device: Samsung Galaxy j5
  

Recording Of The Bug

Here's the video recording of the bug.