@Sukanta_Biswas seems like the good news very soon wasn't so soon after all. I'm having this same exact issue and can't seem to find anyway to add my facebook friends back. Re installed the game and in the progress lost all my boosters.
didn,t have, also no mail box is working with me, can,t add friends or accept add requests sent to me, also this applies on lives sending to friends, no list shown to use it, what should i do???