Umberto, please see this thread:
https://www.fsdreamteam.com/forum/index.php/topic,33416.0.htmlThis is happening to me as well, and only at KSDF. The OP says to reinstall all of Addon Manager, GSX, and KSDF to resolve the issue.
But, I think you guys need to look into what is wrong with Live Update and resolve this.
Thanks.