The most effective way to resolve this is to manually place the missing file into your game's installation folder.
Place the vorbisfile.dll (and often ogg.dll , as they work together) directly into the main folder where gta_sa.exe is located. Secondary Solutions Vorbisfile.dll Gta Sa Missing
If you are using a mod like SA-MP, you may need to download the specific version of the file recommended by the SA-MP Forums . The most effective way to resolve this is