Cannot add new TERMs to Managed Metadata Service in sharepoint 2016 on premise

[Albert Vadacchino]

Hi,

I am the administrator of our Site. I am trying to add a new Term Group with new TERMS in the Term Store Management Tool, but when I right click on "Managed Metadata Services" i don't get the option. My name is there as the Administrator.

Hope you can help.

Thanks.