spotifydownload | A dependency-free Spotify playlist downloader | Download Utils library

I have a lyrics app where I need to download the lyrics from all songs in a Spotify library. This process has 3 functions: the first calls the Spotify API to retrieve the list of songs and saves that to a list; the second calls the Genius API to search on their database and attempts to find a song with matching title and artist; the third calls the Genius API again to get song details like album name and featured artists and also loads the page containing the lyrics to then save everything into a file.

Problem is that for some reason, whenever the JSON parser (from JSON.NET) finds a null value it freezes the entire task, without throwing an exception or anything. I have basically this same code implement in my Main Activity and whenever there's a null value it just returns an empty string. For whatever reason this time it simply refuses to keep going.

Here's the code from part of the third function: