Same issue. Receiving broken link on Facebook for Candy Crush Saga. I tried to go through King but it wants to list me as a newbie. I was over level 4000.
I am having this issue too and Facebook basically says it is a Candy Crush app setting that is set to development mode. I can’t sync any of my progress and no one will help. :(
This has been an all day problem! And if/when we do get back to the Facebook Candy Crush Saga, you can bet that we will have lost daily visit so that our Treat Wheel will revert back to lower number. Therefore, we will lose out on potential wheel treats! Arrrrgh.