Hi there!
Did you download the game from Steam? If so, try clearing your game cache!
1. Restart your computer and launch Steam
2. From the Library section, right-click on the game and select Properties from the menu.
3. Select the Local files tab and click the Verify integrity of game files... button.
4. Steam will verify the game's files - this process may take several minutes.
For more information, please review the knowledgebase article below.
[url=https://support.steampowered.com/kb_article.php?ref=2037-QEUH-3335]More Information[/url]