The following will show you detailed steps. If don’t know how to fix “Unable to Initialize Steam API” error on your PC, you can try the fixes mentioned in this post.
This article has summarized some effective fixes to the Steam error.
The reasons for “Unable to Initialize Steam API” Steam error can be various, such as Firewall blocking the game’s executable from connecting to the Internet, Comodo Internet Security putting the game on the Auto-Containment list and so on. The error “ Unable to Initialize Steam API” can occur after you launch any game in the Steam library, which prevents the user from starting the game and cause inconvenience. Allow the Game’s Executable in the Firewall What does this mean? How to fix the error? This post from MiniTool will show you more detailed information and effective solutions.
When you try to launch a game in your Steam library, you may receive the error “ Unable to Initialize Steam API”.