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I've been having to restart my saves every time I play again, as it seems the more turns have gone by, the less likely I would be able to access it.  I have save files where it only has around 10 turns and they will load, but not larger ones. When I click on my saved maps the button goes a dark grey, and back to white. Does anyone deal with this? And if so do you know how to fix it?

Is it on my end or is it the game? But, whenever I try to boot up a save I worked on the previous day it wont load. It doesn't crash or anything, just doesn't load.