Proxmox Cluster: SSL Error and Host Verification Failed

I created the cluster via the webUI on my pve node, then joined the r330 one.
After joining, the webUI for the r330 cannot be reached, and if i try to look into it from the pve webui, i see a pve-ssl.pem error and host key verification failed.

root@pve:~# pvecm status
Cluster information
-------------------
Name: MainCluster
Config Version: 2
Transport: knet
Secure auth: on

Quorum information
------------------
Date: Tue Feb 11 16:55:04 2025...

Click to expand...

Read more