LowLevelFatalError: Game crashes on launch, because of missing PxFoundation_x86.dll

Some of my players are reporting an issue where the game will crash as soon as launching is attempted. This didn’t happen before I upgraded to UE 4.17.

The exact error seems to be:

LowLevelFatalError [File:D:\Build++UE4+Release-4.17+Compile\Sync\Engine\Source\Runtime\Engine\Private\PhysicsEngine\PhysXLibs.cpp] [Line: 84] Failed to load module '…/…/…/Engine/Binaries/ThirdParty/PhysX/Win32/VS2015/PxFoundation_x86.dll'.

One player examined further and found that PxFoundation_x86.dll&apos wasn’t present in /Engine/Binaries/ThirdParty/PhysX/Win32/VS2015/.