^^So similar to the issue in this post:
Started to mess with the folders option on my desktop Spotify App - created folders & one was the same as a playlist. Tried to then turn on my phone app and it crashes. Uninstalled, reinstalled, immediately crashed after trying to log in via Facebook. Uninstalled, deleted all spotify files on my phone, restarted my phone, reinstalled app, and crashes again. I've done this at least 3 times. Have tried to install older verisons of the app (http://spotify.en.uptodown.com/android/old) - same issue.
Phone - LG G4 (v. 5.1).
I don't know what to do at this point and I use Spotify almost everyday for my music (yay being a premium member).