Roon ARC Error code 504 happening for past 2 days

[Suedkiez (Just a fellow user like you)]

@Chikolad

ClientUPnPError … ConflictInMappingEntry

It’s may be a bit strange that the error changes after a reboot, but

ConflictInMappingEntry may indicate that you have this:

Roon ARC port forwarding issue

This is the error after you turned off antivirus. The ConflictInMappingEntry looks like you might have conflicting port forward rules, or you have duplicated IP addresses on the LAN Maybe you have UPnP enabled AND set up manual port forwarding rules for the same ports. In this case, either use UPnP and delete the manual rules, or use a manual rule and disable UPnP on the router. It may also be caused by forwarding ports 50000-50002 - as mentioned, you only need to forward one port, the one th…

Or maybe more likely because you have a modem and a router:

Roon ARC port forwarding issue

Ah, I missed that. I was going by “My Networking hardware is the ASUS RT-AX82U WiFi 6” and overlooked the later mention of the ISP router. OK, the principles of what I wrote remain correct, though, but you need two rules, I think: Set up port forwarding on the ISP router. I guess you will need to do it manually. – The ISP router is the external interface and it must be able to forward from the external IP & port to the internal network, this being represented by the Asus – Make sure that t…

The new error when checking for update may or may not mean anything. Possibly just a temporary issue on the Roon server, for instance. They released an update earlier today. I would wait for a day to see if it goes away before I’d start worrying about this.
EDIT: Just saw someone else with a similar update error when trying to install, so I guess it’s really just a general issue on Roon’s update server