In certain cases, not being in the Steam Beta program caused the problem which usually means Steam intended to fix the problem in the next update. Below we have multiple solutions you can try to resolve your issue.
1. Run Steam as an Administrator
This issue is also caused when the game’s privileges is higher than the Steam. This causes an issue between permissions and doesn’t allow Steam to run the game properly. So to fix this issue, we are going to run Steam as an administrator. Follow these steps:-
2. Verify Integrity of Game Files
Some players have confirmed that, after the error started to appear, verifying the integrity of game files managed to find several files which were missing or corrupt, and redownloading them helped fix the problematic game.
3. Restart Steam Completely
This error can also happen sometimes if you have accidentally opened two or more instances of Steam which caused multiple Steam.exe processes to start on your computer. Also, various other Steam-related service can cause the problem to appear and players were able to solve it simply by restarting Steam completely.
Note: Some users have reported that the problem can be solved simply by opening Steam as an administrator after closing it. After you have closed Steam completely and killed Steam-related processes, try following the steps below in order to run Steam as an administrator.
4. Logout and login of the Steam Client
This method is similar to the one above except that it’s faster and it only involves logging out of the Steam client and logging back it. Restarting Steam completely is better but sometimes the problem is related to your Steam account and that can only be fixed by logging out.
5. Uninstall the Game from Your Computer
Reinstalling the game on your computer can fix the problem as it did for certain users and we have to thank Steam from making the process appear quite easier than it is when uninstalling and installing games outside of Steam. This way you can simply redownload game files and Steam should take care of everything after a few clicks.
6. Delete the Appcache Folder in Steam Root
Deleting this folder will reset the application cache for the Steam client and it can definitely faster than reinstalling the entire Steam client as that involves backing up game files. This useful didn’t for everyone but it worked for some people and they saved time since they didn’t have to uninstall the Steam client completely.
7. Reinstall Steam
Reinstalling Steam can also fix this issue as it completely delete all the files that might be causing the fatal error. This also refreshes all the processes and services bound to Steam Client.
