YUM upgrade fail Using CWP

Hi There,

I'm am unable to update  Linux 8 - AppStream. yum upgrade fail in my centos with centos panel

Can you help me to fixed it out ?

[root@nshosting8 yum.repos.d]# yum upgrade
CentOS Linux 8 - AppStream                                                                                                                                                                                                     157  B/s |  38  B     00:00   
Error: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist
[root@server ~]#

Thanks & Best Regards
Millon
https://www.unikainfocom.in/