Resource use picture can't be found after upgrading Proxmox

Hi all,

I just updated Proxmox with apt-get update/upgrade and sinch then the pictures of the CPU, Memory usage, Network traffic and IO are unavailable.
The pictures can't be found is what the browsers said.

My proxmox configuration is standaard, but I use a custom SSL certificate for the https connection.

I Hope someone can help me.

Greeetz,

guidonline