My problem is exactly the same as yours. I do not bother with spotify further I stop paying for this negligency in the future. I had spotify premium for long time using email@example.com and a free spotify using firstname.lastname@example.org. The premium version is not willing to connect to may facebook, sendig the same error message.
My spotify account email@example.com is unable to connect to my facebook account firstname.lastname@example.org (Mark Bowman). I get the error Sorry there has been a temporary error, please try again later.
Hi, I get the same error. I have deleted Spotify from the Apps sections in Facebook. I click the button, it takes me to facebook to approve, but in my Spotify profile I get "Sorry there has been a temporary error, please try again later."