I’d bet that’s your problem, you don’t want a router you want a switch, they’re very different. Switches deal with Mac addresses which are hardware (like your Euphonix) and routers deal with IP addresses . That’s a very basic difference but for the price of a proper switch it’s worth trying.
$35 for a 5 port switch.
If you’ve got internet in your studio then just plug your internet router into the switch, and all your computers, Euphonix devices into the switch as well. Switches work best for local networks which is what you basically have with you Econ and computer connections, Routers deal with WWW. IP addresses.
MC