: Ensure you have the latest version of Sider installed in your main PES 2021 directory.
Download the addon and extract the contents using a tool like WinRAR or 7-Zip. You should see a folder typically named boot-root or similar. Download File PES 2021 Boots Addon AIO 26.10.22...
If your download includes a Boot-AddOn folder, copy it into livecpk as well and add its corresponding line to sider.ini : cpk.root = ".\livecpk\Boot-AddOn" : Ensure you have the latest version of