[2021] Old save cannot be read

1.1.2 saves will not work properly with 1.3.0 version of the game. Only 1.2.2 version of the game should translate properly into 1.3.0 Corvus.
What I can suggest you is to port the game into 1.2.2 version first, saving the file and then booting 1.3.0 version and saving again. I cannot guarantee this will work correctly, but I hope it does!