Ошибка: Failed to download metadata for repo ‘AppStream’:

При попытке запуска yum возникает ошибка

[root@centos ~]# yum update
CentOS-8 - AppStream 162 B/s | 38 B 00:00
Ошибка: Failed to download metadata for repo 'AppStream': Cannot prepare internal mirrorlist: No URLs in mirrorlist