Spotify not starting up V3.5.0.963

[Mllnh]

Hey,

Can someone please help me out? I really love this app and always use it whenever I can. 

So I have Spotify Premium and never had big troubles with the app, but the latest update (v3.5.0.963) kind of messed up the app for me I think. It started when I randomly couldn't  start a song on my phone while I already 'downloaded' the whole playlist. (I had Wi-Fi & Offline Mode wasn't on) I decided to restart the app and my phone. But nothing worked. So then, I tried to delete the app, turn my phone off, wait 30 sec and then try it again. But that didn't work as well. When I deleted everything and switched all my playlist to 'Not offline available', I tried to 'download' the playlist again but it didn't download the songs anymore. I tried it on the Wi-Fi at school, the Wi-Fi in the train and with the Wi-Fi at home.

I tried to log in on someone else's phone to check if 'downloading' the songs on their phone would work and the app + my account worked as it should. 

But I think I've created a bigger problem now, because now I can't even open the app anymore. Everytime I try to open the app, I get an error that forces me to close the app again.

Someone please help me! I can't get on the road without music anymore! 😞

I use a Samsung Galaxy Note 2 GT-N7100 

The phone the other person used was a Samsung Galaxy S4