Rancher 2.5 - Error Connecting Web Socket

Rancher 2.x
1

Hello,

i have Rancher HA 2.5 installation (2.5.8) that was upgraded from 2.4.6. After the upgrade we recieve on video this error:

image

Rancher is installed on Centos 7 servers (VM not AKS) on Azure.

Can you help me with this problem?

Thanks,

Alessio