It can be caused by some damage in-game files. Please, try to verify the game’s integrity. What you have to do:
1) Open the Steam client and navigate to the Library tab
2) Right-click on the game that is showing the error, right-click on it and choose Properties
3) In the Properties menu, go to Local Files and click on Verify the Integrity of Game Files
4) When the process is finished, open the game again and see if the issue has been resolved.