The file cannot load because it's incompatible with this version of the game

I'm getting this message every time I try and load up my (only) Connected Franchise from the main menu. I have also tried loading from the "resume offline" section but this gives the same message. Trying to load the Auto Save file results in a "Loading Data" screen coming up which never develops into anything.

Has anyone been able to find a way to fix this? it's a bit frustrating seeing as I've been playing non-stop for three weeks and not being able to access the only game file I have means I've pretty much wasted all that time.