The error means the game’s DRM (Digital Rights Management) or anti-tamper system cannot verify that Steam is active. This usually happens for three reasons:
Check firewall/antivirus interference
Leo dug deeper into the game's folders ( SteamLibrary\steamapps\common\RESIDENT EVIL 4 ). He realized that sometimes, old mods or "crack" files (like steam_api64.dll ) cause a handshake failure between the game and the Steam client. He noticed a strange .ini file from a mod he’d forgotten about. He deleted the rogue file and ensured his was synced. Phase 4: The Final Ritual The error means the game’s DRM (Digital Rights