proxmox novnc failed to connect to server error


New Member
Jun 29, 2019

I am new to Proxmox and have to teach it as a class for a Community College this coming fall. I did install latest version 5.4-1 as a VM on a VMWare 6.7 ESXi host and it succeeded. I created a new VM but when clicking on console I got this error: proxmox novnc failed to connect to server

Any help in resolving this error is greatly appreciated. Thanks
what does the tasklog for the console say? did you start the vm first?
I started VM first and task log shows this error" Failed to run vncproxy". My school has no plan to purchase a commercial subscription. They are moving away from VMWare to avoid paying money. Isn't Proxmox an open source hypervisor? Thanks
Are you using Custom SSL Certificates like let's encrypt? If yes, try to remove them and check again.


The Proxmox community has been around for many years and offers help and support for Proxmox VE, Proxmox Backup Server, and Proxmox Mail Gateway.
We think our community is one of the best thanks to people like you!

Get your subscription!

The Proxmox team works very hard to make sure you are running the best software and getting stable updates and security enhancements, as well as quick enterprise support. Tens of thousands of happy customers have a Proxmox subscription. Get yours easily in our online shop.

Buy now!