I have been wondering about this for days. The strange thing is, the day before all three GTA titles were removed, San Andreas finally received a patch.
I tried asking Rockstar Games on twitter but I didn't receive a response.
I downloaded the 4gb update to SA and installed but the app store kept saying I had an update afterward. Each time it was a 20mb download and then the next day there were the errors the OP is showing. I'm hoping this gets resolved soon.