Hm. You could try "disabling the Nvidia driver" as described in this thread (I'm not sure exactly what this means, but it seemed to work for at 2 people): https://steamcommunity.com/app/1923790/discussions/0/3395163747096165276/
(also, just for the record, the two ERROR lines about the Steam API are expected, they happen even when running the game normally.)
Great! :)
For any future readers: This other Steam thread recommends not disabling Nvidia drivers, and instead:
in the Nvidia Control panel under manage 3D settings set Anisotropic filtering, Anti-aliasing, and Preferred Refresh-rate to Application Controlled.
https://steamcommunity.com/app/1923790/discussions/0/3426689579745630299/