Just install the latest UI VIB v1.31.0 as was stated. Problem solved.
See ESXi Embedded Host Client
http://download3.vmware.com/software/vmw-tools/esxui/esxui-signed-9277095.vib or
http://download3.vmware.com/software/vmw-tools/esxui/esxui-signed-latest.vib
Host: Manage: Packages: Install update
Paste the URL and go...
