This message typically appears with games that use , CEG (Custom Executable Generation) , or Solidcore DRM (used in some newer Denuvo-protected games). A crack is supposed to bypass Steam, but if this error shows up, it means the crack didn't apply correctly or is incomplete.
It sounds like you're encountering a common error when trying to run a cracked game: "Solid feature for Steam must be running to play this game." steam must be running to play this game crack