ETS 6 Error with Hager TH210 - "could not connect to IP interface (There are no more unique additional addresses available)

Hi all

All of the sudden my ETS stop communicating with the BUS returning the following error: "Could not connect to IP interface (There are no more unique additional addresses available)".

I'm using a Hager TH210.

I've exhausted all attempts to get it working. Any help?