Error on noVNC console

[cloudfastservers]

Unable to resolve the server's DNS address.
from proxmox work perfect . my customer try but get this error i really need help , Module Garden support respond very slow
thanks
running proxmox vps module latest version

[Joanna]

Unfortunately, we have not managed to find any recently opened or pending reply tickets of yours. Please contact our Support Team or provide a ticket number if you have already done it. We will use our best efforts to resolve a reported matter promptly.