Curl 60 error when updating system

I installed Rocky Linux 8.4 as a VM on a Proxmox host. The issue I’m having post-installation is that I can’t update the Rocky Linux system.

[jcole@rocky ~]$ dnf update
Rocky Linux 8 - AppStream 0.0 B/s | 0 B 00:01
Errors during downloading metadata for repository ‘appstream’:

How do I rectify the certificate error?