Spotify won't connect to FB on my iPhone 6s only

[Dave3321]

I can log into Spotify on my desktop and it links to my FB with no troubles at all. But all of a sudden two days ago, it will not connect on my 6s. I type the password and all in, hit "go" and the page refreshes and does nothing...... I have deleted both FB and Spotify off the phone and re downloaded them, didn't work. I have a 6 hour road trip tomorrow morning and need this working. Help help help.