app crashes when changing store books storage while click on back to home

[kr-nahid]

Expected behavior

this app shouldn't be crash when changing store books storage and try to go back in home .

Actual behavior

when i stay in home sector and go to change Books data directory and select external sd card and then click back button to back home but it crash .

How to reproduce

• download the app
• open it and go to settings then click on Arabic user interface and tuned it in English
• then scroll on Home sector
• then go to settings and click on Books data directory
• then select External SD card and click OK
• it copying file
• press back button to go home when coping complete
• note the bug

Browser/App version: Islamic Library v1.4.4 Operating system: android 6.0

Recording Of The Bug

https://www.youtube.com/watch?v=amkCcLRU8U0