Multi window not working

[Shanecarlton]

When I try to click on the task bar for multi window it's saying com.sec.android.app flash bar has stopped

 

[Bored Hacker]

1.) Open settings
2.) Tap on apps
3.) Tap on three dots on top right corner
4.) tap on show system apps
5.) Look for badge provider app
6.) Tap on it
7.) tap on storage
8.) tap on clear data

That should resort the multi window features.