Hi, Since some days back I've had the same issue. It crashes on launch, but if I switch to Airplane Mode, starts spotify, don't answer the dialog that informs me about Airplane Mode it sometimes starts. I have tried a proper reset of the iphone.
Nope, resetting phone, reinstalling spotify and numerous attempts to give it 3g/2g, wlan etc didn't do much, it seems only to delay the crash sometimes. But what did work was to after reinstall never use the filter options to only show offline playlists. If I leave that on and restart the app it crashes and I have to reinstall.
I have an Iphone 7 plus running IOS 11.1.2. A few moments ago Spotify wouldn't load. All I get is "An error occurred try again." I powered the phone down, started it up again and the problem is still there. I then eliminated the Spotify app and reloaded it again from the App Store. Spotify still doesn't work. Can anyone help me with this annying problem?
BTW, Spotify works fine on my MacBook Pro running 10.13.1.