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

substitua isso
https://flixapp.tv/api/get_app_setting/

por esse exemplo
https://dominio.com/pastas/api/fetch?m=


Step 2

substitua isso
https://iboiptv.com/api/playlist_information/

por esse exemplo
https://dominio.com/pastas/api/getplaylist?m=
                                                                       

