I'm getting the same @djmcgoo, mine started yesterday too. Like you, I've done all the usual and still nothing, not sure if it's Facebook pay or King, it's spoiling my weekend though.
Has anyone got any ideas, I play on my PC on Facebook?
Okay I've just managed to make a purchase, I had to keep trying over and over again and eventually it happened, there must be a glitch somewhere but they seem to be trying to fix it now.