I can't login to spotify with facebook

[11132695666]

Hello, I have ipod touch 5g ios 8.4.1 installed. I am using last version of spotify(4.4.0) as well. When I try to login with my facebook account, three dots appears on screen and app freezes at this stage and I can't pass this screen. I tired to reinstall the app but didnt work. I can't login, tried almost everthing, still app doesn't work. Btw I dont want to upgrade to ios 9. How can I solve this problem? Thanks.