to ensure it has the necessary permissions to read and modify files. Check Version Compatibility
Follow these troubleshooting steps in order to pinpoint and fix the issue. 1. Run the Installer as Administrator
Right-click PES 2021 in Steam, navigate to Properties > Updates , and select "Only update this game when I launch it" . Always launch your game via Sider offline instead.
Navigate to KONAMI > eFootball PES 2021 SEASON UPDATE > [Long Number Folder] > save .
Advanced users can extract the update package (using tools like 7-Zip or the vendor’s extractor) and look for a subfolder or manifest file referencing sp21 v4 . If it’s missing, the update file itself is likely defective — re-download it.
In practical terms, the update process expects certain files, version markers, or registry keys that indicate SP21 v4 is already partially installed or available. Since it cannot find them, it aborts.
Step 2: Download the Correct "All-In-One" (AIO) Base Package
for eFootball PES 2021. It means the installer cannot locate the core v4 files required to apply the patch. Why This Error Happens
To resolve the "Cannot update the patch SP21 v4 was not found in the update" error, try the following steps: