Sites like Fix4Dll often host libraries, but there is no guarantee they are safe. According to security experts on File.net , system files should only come from official sources or original installation media. If you still have no luck, your best bet is a clean reinstallation of the game.
If you own the game on a digital storefront, the launcher can automatically detect the missing file and redownload it for you. Open your Library . Right-click on Sleeping Dogs: Definitive Edition . Select Properties > Installed Files . Click Verify integrity of game files . Sleeping Dogs Buddha Dll File Download