Can't enter a room with myself

I wanted to trade with myself on pc, so i followed a guide ( how to run and connect 2 citras on pc. The problem appears when I try to create a room with one citra and connect to it with the other citra. I only get this message: ip is not a valid ipv4 address
So, how can I fix that?

In order for us to provide better support, we need to see the log generated by citra. This guide will walk you through how you can obtain the log file: How to Upload the Log File