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Good evening,
I did the same thing haha. I had to remove the app (in my case paradise bay) from Facebook, clear cache etc and then readd it, and it asked me the permissions again. It needs your friends though or you will struggle as you found out. I thought exactly the same!
If you need help to clear the cache etc, its here.
https://care.king.com/en/candy-crush-saga/cant-get-your-games-to-load-on-facebook-check-this-out
Thank you for posting