Decompile the apk and locate the following: 

lib>arm64-v8a>libgojni.so 
lib>armeabi-v7a>libgojni.so 
lib>x86>libgojni.so 
lib>x86_64>libgojni.so

Search for the following "https://flixapp.tv/api/get_app_setting/" and "https://iboiptv.com/api/playlist_information/" replace with 
your hostname and foldername this is 39 characters And 45 characters.

Step 1 
https://flixapp.tv/api/get_app_setting/ Replace with your URL EX https://yourdns.com/iboplayer1/a/fetch/

Step 2
https://iboiptv.com/api/playlist_information/ Replace with your URL EX https://yourdns.com//iboplayer1/a/getappuser/

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Thanks