When I launch the game. I get this error message:
Name: forge-1.12-14.21.1.2443.jar
URL: http://files.minecraftforge.net/maven/net/minecraftforge/forge/1.12-14.21.1.2443/forge-1.12-14.21.1.2443.jar
Error details: HTTP 404: Not Found
Filename on disk: 1f8b-efff-9e5e-61ca
Path: /var/folders/2g/4x1xzstj4vdbj939flg1q7v00000gn/T/1f8b-efff-9e5e-61ca
Exists: file
The Maven server Broken ?