Same for me. If I turn off wifi and cellular it will load and I can play but as soon as I turn them back on it won't load. And since I'm playing not connected to anything none of it will be sync'd so now we'll lose actual progress.
It appears people have been having this issue for weeks. Mine just started yesterday. I’ve rebooted my phone. Checked for latest iOS update and Candy Crush update. Nothing is working. I do NOT want to delete the app and lose all my boosters. Please fix this issue or provide a solution for us our boosters to be reinstated…