If for any reason you are still on Windows 7 and the game does not start for you, then the following method can help to fix the situation.
And here you are, despite the system requirements on the game page, bought Warhammer Age of Sigmar anyway: Storm Ground, have established, trying to run, but it naturally does not start. And strangely it does not start like that: you press the start button, for a couple of seconds Steam gives you the status that you are in the game, but then resets to standard “Online”. No mistakes, no warnings, nothing is output.
However, if you follow the path Stim folder steamapps common Warhammer Age of Sigmar Storm Ground Warfield Binaries Win64 and run StormGround.exe from there, then Windows will cheerfully swear at the xinput1_4.dll library. I had exactly the same problem with Nioh 2 and one way helped.
Next, we launch the game and it works.!