If you have already been playing the game after 17th October (Patch 0.44) then you can ignore this entire post
What's Going on?
If you haven't logged into the game since 17th October (Patch 0.44) then you will lose your save progress after 25th November
Why?
Patch 0.44 introduced a new save system which works far better than the old for many reasons including speed, low file size and performance. However the old save system is still in the codes and causes issues with loading times. The reason the old save system is still in the codes is because it is required as part of the conversion phase from your old save to the new save system
What do I need to do?
Make sure you have launched the game at least once after patch 0.44 (Between 17th October and 25th November) and just quickly go to settings or upgrade menu and go back to the main menu to ensure the auto save function has kicked in for the new save system