The UE4-Hatred Game has crashed and will close

LowLevelFatalError
[File:*:\HATRED_COOKING\Engine\Source\Runtime\Windows\D3D11RHI\Private\D3D11Util.cpp] [Line: 259]
*:\HATRED_COOKING\Engine\Source\Runtime\Windows\D3D11RHI\Private\D3D11Viewport.cpp:(198): BackBuffer-> GetResource() has 2 refs, expected 1

It has already been suggested by the developer that Discord can and often causes this error. This was my case also.

Go to Discord App, find "Settings" in the bottom left corner. Then proceed with "Overlay". At the top find "Enable in-game overlay toggle" and turn if off.

This was second software causing this error in my case.

Open Nvidia GeForce Experience. Top right you can find "Settings". Select "General" tab and in about a middle part you can see "In-Game Overlay". Turn it off.

In the bottom left corner press "Settings", then navigate into "General" tab and at the very bottom uncheck "Enable Game Hooking".

It generally looks that any software that has in-game overlay will cause this issue, even when not active.

It has also been suggested that overclocking CPU might interfere with the game. I personally use ARMOURY CRATE software to overclock my i5-13600KF and had no issues with software or overclocking itself. But I suppose it makes sense to mention it, just in case.

Hopefully this helped you, but if not, leave a comment and maybe we can come up with another solution that you need to run the game.