: Antivirus programs, including Windows Security , often flag cracked DLL files as "false positives" and quarantine them. Check your antivirus history for steam_api.dll or OnlineFix.dll and restore them if found.
: Right-click on the SonicGenerations.exe file (or the Steam executable if you have it installed) and select Run as administrator to ensure the game has the necessary permissions to access system resources.
The most effective ways to resolve this issue involve restoring missing files or adjusting how the game interacts with the Steam client.
We recommend unplugging all non-essential input devices from your computer to eliminate the possibility that they are interfering. How To: Fix Sonic Generations Configuration Error