Affects Version/s: Minecraft 1.12, Minecraft 1.12.1
Fix Version/s: None
Minecraft had been working fine on the new launcher for roughly three months and all of a sudden had an error saying a lang file was missing. As a test I downloaded the old launcher again, and the game launches successfully on it. It seems to be a problem with the new launcher.
Full reinstall did not help.
I have seen that many reports like these are resolved and blamed on a program called ByteFence. I do not have this program. This is not ByteFence
Error details: Request error -101: ERR_CONNECTION_RESET
Filename on disk: f551-ddee-fea1-4bb6