I'm getting the same thing.
I too have a retail version which I bought several years ago. I uninstalled and reinstalled for .4 with no problems. Yesterday I uninstalled everything and attempted to reinstall and start fresh. GTA installed and the game worked. I downloaded LSPDFR and installed and attempted to run. As I said, I got the same as you.
When first running the game after the install, all was fine. On the second attempt to run the game is when it attempted to download and install updates and patches.
I don't think you will have the Rockstar Game Launcher as mentioned earlier. I believe that came along with one of the updates--which we can't get because of the error issue. R Support shows a fix for a 202 code which I tried, and that doesn't work.
I'm really surprised there hasn't been a solution offered.