Most common with Smokepatch or VirtuaRED mods. The Sider tool is missing or blocked by antivirus. Effect: The modded content (kits, faces, stadiums) does not appear; you play the vanilla version or crash on launch.
Since PES 2017 is a DirectX 9-based game, modern Windows 10/11 systems may lack legacy DX9 files. dll files for pes 2017
Point to outdated or missing DirectX files. Most common with Smokepatch or VirtuaRED mods
Right-click on and select Properties . Go to the Installed Files (or Local Files) tab. Since PES 2017 is a DirectX 9-based game,
Open your or third-party antivirus dashboard. Look at the Protection History or Quarantine section. Check if steam_api.dll or a patch-specific DLL was blocked. Select the file and click Restore or Allow on device .
If the file is present but the error persists, you may need to register it via the Command Prompt Open Command Prompt as Administrator regsvr32 filename.dll (replace "filename" with the actual name) and press