Failed to download Minecraft 18w44a

i try to update it but this happen
Failed to download file. 1.14.json
Name: 1.14.json
URL: https://launchermeta.mojang.com/v1/packages/35f4b20517501f1be3b7be671ab9368532ea7da6/1.14.json
Error details: Request error -105: ERR_NAME_NOT_RESOLVED
Filename on disk: 1.14.json
Path: C:/Users\Ozza\AppData\Roaming\.minecraft\assets\indexes/1.14.json
Exists: false