When I start the game, i get the Error Error SteamContext.cpp:33: Steam API could not be initialized.
Start Log:
0.000 Initializing Steam API.
0.000 Error SteamContext.cpp:33: Steam API could not be initialized.
0.003 2016-09-18 12:13:41; Factorio 0.13.20 (build 24011, win64, steam)
0.011 ...