Update Manager not available in WebClient

Hi all,

i'm quite new to vsphere infrastrcture.

I installed Update manager and the plugin is installed and working in vSphere Client but the plugin is not present in vSphereWebClient.

In WebClient the plugin seems up and running:

and also in extensions:

but Update tab is not present anywhere in webclient.

I already tried rebooting vcenter appliance without success

Someone can help me to understand what happened?

Thanks