VMware Server 2 Error: Cannot access virtual machine console
If you have a VMWare Server and use the web admin console there is a chance you will get this error at some point. I have found this problem come up many times with my servers. I get pretty frustrated when this happens but the fix is very simple. Just completely close the browser you are using, so if you are in internet explorer or Firefox make sure the process is completely closed out before you open it up again, maybe even restart your desktop. Once you have done that just connect to your web admin again and connect to the VMware console. This time it will work without an issue.
If you continue to have problems there might be something else wrong with your VMware server, for this you will need to do some more troubleshooting.