Yum update error, certificate expired

Hi, trying to make updates , getting:

failure: repodata/repomd.xml from CyberPanel: [Errno 256] No more mirrors to try.
https://rep.cyberpanel.net/repodata/repomd.xml: [Errno 14] curl#60 - “Peer’s Certificate has expired.”

Believe i’m doing things right having cleared cache. Any help appreciated

David

Does anybody know if https://rep.cyberpanel.net/repodata/repomd.xml should be unsecure? should it be fixed? or should yum not be calling it?