: Use a tool like 7-Zip or WinRAR . Standard Windows "Extract" tools often don't handle .rar files or multi-part archives correctly.
: This usually means one of the parts didn't download fully. Redownload the specific part mentioned in the error. Download its Bollito rar
: Restart your game and check the "Mods" menu to ensure it's toggled on. Troubleshooting : Use a tool like 7-Zip or WinRAR