Forum Discussion
Cannot Connect to VMs in Windows Admin Center
Hi all,
I have 1 Server Cluster made up of 3 Server 2022 Hosts on which there is a large number of VMs running on Hyper-V.
The typical process for accessing the VMs has been through Windows Admin Center, which is hosted on one of the VMs in the cluster.
Around 1 week ago, it was no longer possible to connect to the VMs through Windows Admin Center as an infinite loading screen was presented. Sometimes, the following error shows up in VMConnect:
The cluster and servers are still connected to WAC and all the VMs that are expected are present on WAC.
Since then, the following things have been attempted:
- Restart all servers
- Rebuild WAC on Current VM
- Build WAC on Fresh VM with the same and different network configuration, using current (2606) and previous (2511) versions of WAC
- Build WAC on one of the hosts
All these attempts result in the same error as seen before.
Has anyone experienced this issue before? Or does anyone have any advice?
Thank you in advance!
1 Reply
The screenshot narrows this down: cluster inventory works, but WAC's browser-based VMConnect fails while the keyboard-layout field is unset and returns a JavaScript “undefined” error. Because it follows fresh gateways and two WAC versions, this alone does not show that Hyper-V or the guests are unavailable. First, explicitly select a keyboard layout before Connect. Retry in current Edge or Chrome InPrivate. If that works, clear cached site data for the WAC gateway. From Virtual Machines, try Download RDP file and open it with Remote Desktop Connection, using an account that can administer the Hyper-V host; success isolates the fault to WAC's web console. Confirm the Windows Admin Center and WinRM services are running. If it still fails, collect Microsoft-ServerManagementExperience errors from Event Viewer and a sanitized browser HAR during reproduction. Submit those, both WAC versions, and the exact error to Windows Admin Center feedback.
