Download

how can i fix "Binaries for this Target Platform are not currently installed"?

i am getting this message: “The Binaries for this Target Platform are not currently installed, would you like to use the Launcher to download them?”
for a game i try to package, i did in the past package this game but for some reason i cant now. why is that happened?
i tried to check on the internet for a solution and i see no “option” in my launcher (i use V-4.18)