yess problem is you didnt get android app setting from api as url isshare your debug logcat in private message... i will look into it....
//******************** App Settings Data ********************//
@GET("api/AndroidAppSettings/android_get_all_settings/?insecure=cool")
Call<AppSettingsDetails> getAppSetting();
but when you call this url from splash screen it return nothing and object of AppSettingsDetails is null thats why we face crash