ARC stopped connecting after update despite port forwarding and UPnP (ref#PC5IHN)

[SVinTO]

Network Setup

· My only router was provided by my ISP

ARC Status

· ARC is *Not Ready*

Roon Error Code

· The ARC settings page says "Not Ready," but I can still connect to ARC via cellular data. I'm having another problem.

Describe the issue

After update, ARC stopped connecting. I have port forwarding set up and UPnP on in router settings. Arc worked successfully for years, but no longer does with no other changes to set up or equipment other than downloading most recent Roon updates.

Describe your network setup

Bell Canada
Giga modem
Roon server can connect over wi-fi or ethernet
Mac OSX

[Suedkiez (Just a fellow user like you)]

If it says „error code 526“ in the box, it’s a known problem (one of several at the moment). But ARC as such still works.

Fixed link:

Anyone notice an issue with part of Home Page [or other Roon cloud content] loading slowly? [Investigating]

Hey everyone, a quick update - we’ve identified the issue and applied mitigations to improve stability. Things look better at the moment, and we’re continuing to monitor and adjust as needed. And the ARC error 526 This error hasn’t been addressed yet. Still investigating.

[Jason_Gallier (JasnG)]

I seem to have the same issue. I have spent 3 hours messing around with forwarding +/-upnp and changing ports, dmz on/off/ firewalls and even download Tailscale to my PC and Phone. Multiple restarts of all devices in the chain and still no connection. My router can see Roon and tailscale.

All other apps and streaming/ file sharing and things like remote PC are all working as expected and so I can only think that the Roon update is my working diagnosis at this time.

UK, PC ISP:IDnet

[SVinTO]

Thanks

Will check if I can connect away from my home network and report back.

[Suedkiez (Just a fellow user like you)]

@Jason_Gallier

messing around with forwarding +/-upnp and changing ports, dmz on/off/ firewalls

Don’t. It’s a cloud issue, there is nothing you can do, and ARC works anyway.

There have been countless other posts and threads about this since yesterday, but unfortunately the service announcement banner on top of the forum went up just a few minutes ago.

In particular, don’t (ever) put your Roon Server into the DMZ. Is a huge security hole to do this, and it’s unnecessary and won’t help either.

[SVinTO]

Yes Arc works as it always did. Just get error messages.

[vadim]

Hi @SVinTO and @Jason_Gallier,

The behavior you are describing (Error 526 / “Not Ready” status) is a known issue we are currently tracking. In most cases, this is a display glitch, and ARC functionality often remains intact for playback.

To consolidate reports and provide updates more efficiently, we are closing this thread. Please follow the main tracking topic for the latest status on the fix.

Thank you for your understanding.