Remote access failures after server migration

[cdawg48]

Server Version#: 1.43.3.10896-1
Player Version#: 4.160.0

I moved from bare metal Arch Linux to an Arch Linux VM within Proxmox on my server yesterday. I followed the steps for migration provided here. I am able to see and view all my local media. However, remote access no longer works. It is disabled in the settings. When I try to enable it, it just spins indefinitely.

It is not an issue with my port forwarding or router configuration as I had it working perfectly pre-migration and updated the config for the new local IPs. I do not have any custom certifications or domains. I have relay turned off.

Is there an issue related to Plex Remote Access / authentication services? This seems to be an unresolved issue dating years back in the forums and something people are complaining about now.

There seems to be an issue with the mapping state in my logs. I use a different port but I have also tested it with the default 32400 with no change.

Aug 25, 2026 21:00:06.089 [140579560819512] DEBUG - Completed: [10.0.69.15:37212] 200 PUT /myplex/refreshReachability (8 live) #1a7 GZIP 0ms 320 bytes (pipelined: 4)
Aug 25, 2026 21:00:10.232 [140579560819512] DEBUG - [EventSourceClient/pubsub/pubsub10.pop.ewr.plex.bz:443] PublicAddressManager: Obtaining public address and mapping port.
Aug 25, 2026 21:00:10.233 [140579560819512] DEBUG - [EventSourceClient/pubsub/pubsub10.pop.ewr.plex.bz:443] MyPlex: async reachability check - current mapped state: 'Not Mapped'.
Aug 25, 2026 21:00:10.233 [140579560819512] WARN - [EventSourceClient/pubsub/pubsub10.pop.ewr.plex.bz:443] MyPlex: attempted a reachability check but we're not yet mapped.
Aug 25, 2026 21:00:10.233 [140579417410360] DEBUG - [EventSourceClient/pubsub/pubsub10.pop.ewr.plex.bz:443] PublicAddressManager: Obtaining public IP.
Aug 25, 2026 21:00:10.659 [140579399650104] DEBUG - [Req#1ad] MyPlex: start public ip check and mapping - current mapped state: 'Not Mapped'.
Aug 25, 2026 21:00:10.659 [140579399650104] DEBUG - [Req#1ad] MyPlex: sendMapping resetting state - previous mapping state: 'Not Mapped'.
Aug 25, 2026 21:00:10.659 [140579399650104] DEBUG - [Req#1ad] MyPlex: mapping state set to 'Unknown'.
Aug 25, 2026 21:00:11.020 [140579399650104] DEBUG - [Req#1ad] MyPlex: Published Mapping State response was 422
Aug 25, 2026 21:00:11.020 [140579399650104] DEBUG - [Req#1ad] MyPlex: updating mapped state - current state: 'Not Mapped'
Aug 25, 2026 21:00:11.020 [140579399650104] DEBUG - [Req#1ad] MyPlex: mapping state set to 'Not Mapped'.
Aug 25, 2026 21:01:01.447 [140579436395320] DEBUG - PublicAddressManager: Obtaining public address and mapping port.
Aug 25, 2026 21:01:01.447 [140579427957560] DEBUG - PublicAddressManager: Obtaining public IP.

As a recently new Plex Pass admin from a long time Jellyfin user, I am having a hard time understanding what my $250 got me.

[tom80H]

The http error code (422) implies there’s some kind of communication problem when your server tries to publish its connection details to Plex (or processing the response from Plex‘s backend). It’s hard to tell what’s going wrong based on only the snippet of log.

@cdawg48

This seems to be an unresolved issue dating years back in the forums and something people are complaining about now.

Not aware of any „years old, unresolved issue“. What issue are you referring to?

[JohnAlex]

There was a temporary outtage earlier today. Impacted remote access.

Resolved now I think despite Plex never reporting it.

A thread on this forum and on Reddit and elsewhere.

Remote Access (again) seems to be problematic

Using the latest PMS - once again remote access has been a bit of a pain for about the last 20 minutes. Playing tracks via Sonos is intermittent, frequently coming up can’t connect to Plex, and then when trying to browse it as a media source getting either “Unable to browse music” or “Unable to connect to the Plex Media Service, Please check your server settings at plex.tv and make sure remote access is enabled”. It is. The port is forwarded and is working correctly, nothing has changed from th…

https://www.reddit.com/r/PleX/s/5284m7miU2

[cdawg48]

Plex need to do better about posting info about outages like this and providing updates on when service will be restored. That is what we paid for. As a software engineer, Plex is over complicating remote access. There should not be a world where remote access can “go down” while their authentication service is fully functional.

[cdawg48]

It was an unfortunate time for me to migrate. There are many unresolved, reply-less posts in the forum if you search “remote access migration” that date back many years. That’s what lead me to believe there was some issue.

It would be nice if Plex had a way to tell their paying users that there was an outage impacting specific services in an accurate and timely manner.

[bonusplay]

Should I assume there’s another “unfortunate migration time” the very next day? I’m still getting 422 responses on my plex server.