I am also having this problem. Saves work fine untill I get to the point in new hope level_02 (I think) where you have to put all the items in the car inventory. Please see attached save file. Bug is possible related to this https://forums.factorio.com/forum/viewtopic.php?f=11&t=4550&p=34228&hilit ...

I did try a search first, looks like I was a little to specific! Edited the file for a fix and all is good. Thanks for your help.

Just purchased the game so I am using a fresh install. Getting the error
Unknown key:"Error while running the oninit: ...Data\Roaming\Factorio\temp\currently-playing\control.lua:39: attempt to index field 'wall' (a nil value)"
When attempting to start New Hope level01 on normal difficulty.