Adding an IP Address to the IP Listen list generates error "Oops.. Looks like something went completely wrong!"
You may also get an error message that site can't be reached.
Adding the RR Core server into the IP Listen list creates a conflict and the Web GUI can't be accessed.
Remove this IP address from the IP Listen list.
Add the IP addresses "127.0.0.1" and "0.0.0.0" to the IP Listen list