Load error 2307 x64

I had started a game, the hearthlings were starting a “Dining Hall”, had to leave a bit, saved, came back a tried to load the saved game, got spammed with this error:

Then this:

The saved game was unplayable after that.

Windows 7 Home Premium 64-Bit
Alienware R4
Intel® Core™ i7-4820 CPU @ 3.70GHz 3.70GHz
GeForce GTX 760 (2)