ipad1 , is it incompatible now?

did you change something.. i was playing on ipad1 , and when i try to log, its not working.. if i put my adress to log with it.. password don't work and they said they send link i don't receive nothing.. if i try to log with facebook , the game say my game is not updated.. but its the more recent version.. it used to work but since today its stoped to working