The missing file is usually an indication that you do not have DirectX installed on your computer or the DLL file has been removed by some user or application. This issue is not a big one and can be fixed by rather simple methods. Take a look.
How to fix Steam_api64.dll is missing
We will start with the easiest workaround before we move on to mode tedious and demanding ones. Make sure that you have an administrator account before proceeding with the solutions listed.
Dying light steam_api64.dll is missing: This signifies that the game Dying Light is not opening because of the missing of the DLL file. This can be solved using the solutions listed below.Steam_api64.dll is missing Fallout 4: Like the error above, this occurs when Fallout 4 is unable to launch because of the missing DLL file.
Solution 1: Installing DirectX
DirectX is a popular API which is used by numerous games and applications for graphical support and for using the package in their in-game backend mechanics. DirectX comes along with a vast range of DLL files that help in its operation. If DirectX is not installed on your computer, this can induce the error at hand.
Solution 2: Verifying Steam game files
Steam has an inbuilt mechanism to detect missing files and replace them accordingly. It will also scan the already downloaded files and if any of them are corrupt, a replacement shall be done. If you are having this error for any specific game, make sure that you verify its game files. If it is occurring for all of them, try verifying for each one by one.
Navigate to Steam settings by clicking Steam from the homepage and clicking Settings. Once in the Settings, open the Downloads tab present at the left side of the interface.
Solution 3: Downloading the DLL and replacing
If the latter doesn’t fix the problem, you can try downloading the DLL files manually and replace it in the correct directory. There are no official sites that offer DLL files so you have to be extra careful while downloading to avoid malware infecting your computer. Note: The link given is purely for informational purposes of the ready. Download the DLL file at your own risk.
In addition to the above solutions, you can also try the following:
Reinstall Steam completely from scratch. Make sure that all the temporary files are deleted before proceeding.You can also copy the DLL file from another computer that has Steam up and running. Copy the DLL file and paste it in the correct location.Make sure that you have updated graphics drivers and also try disabling your antivirus software.Try launching the Steam client in compatibility mode.Run the game as an administrator.
Fix: Cnext.exe cannot start because MSVCP120.dll or Qt5Core.dll is missingFix: SDL.dll is missing or SDL.dll not foundFix: Run DLL BackgroundContainer.dll ErrorFix: Microsoft Word and Outlook 2013 Crashing with ntdll.dll/MSVCR100.dll
