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Failed To Load Steam_api64.dll

I recently updated Steamworks API from the latest unity package, and spend a long time debugging a strange issue: I had the 'DllNotFoundException: steam_api64' error, although the dll was placed and configured correctly.
ارور Failed To Load Library Steam_api64.dll
Error Failed To Load Library Steam_api64.dll
Failed To Load Library Steam_api64.dll Metal Gear
ارور Failed To Load Library Steam_api64.dllIn Editor log, I found an error that says 'Plugins: Failed to load 'Assets/Plugins/x86_64/steam_api64.dll' with error 'Access is denied.'.`
What options do you have to get rid of 'failed to load library dnsapi.dll' issue. In the majority of cases, the solution of failed to load library dnsapi.dll issue is to correctly reinstall particular software that is using this file on your PC, to the Windows system folder, or to the game or application installation folder. Fix: Steamapi64.dll is missing If the issue is with your Computer or a Laptop you should try using Restoro which can scan the repositories and replace corrupt and missing files. This works in most cases, where the issue is originated due to a system corruption.
In the end, I found out that the DLL file had strange ermissions with something that looked like NULL SID:
Also, when I was opening the permissions dialog, I got this warning:
In advanced security settings, I also found this entry:

Also, notice that security inheritance is disabled.
Another DLL in the same folder, which was loading OK, didn't have these entries:
Error Failed To Load Library Steam_api64.dllFixing the issue turned out pretty simple: delete everything in advanced dialog, and turn the inheritance back on. After that, the error goes away. Also, steam_api.dll has the same problem.
Failed To Load Library Steam_api64.dll Metal Gear

Also, notice that security inheritance is disabled.
Another DLL in the same folder, which was loading OK, didn't have these entries:
Error Failed To Load Library Steam_api64.dllFixing the issue turned out pretty simple: delete everything in advanced dialog, and turn the inheritance back on. After that, the error goes away. Also, steam_api.dll has the same problem.
Failed To Load Library Steam_api64.dll Metal GearSince I just got the files from unity package, I think they're packed with these wrong permission overrides.