It could happen that the Proxmox GUI is not responding to http request.
One reason could be that the webdaemon is not running or has crashed.
Try restart of the service:
service pveproxy restart
It could happen that the Proxmox GUI is not responding to http request.
One reason could be that the webdaemon is not running or has crashed.
Try restart of the service:
service pveproxy restart