Issue pulling custom app from registry on the same cloudron

[mathieuepitech]

Hello, I got an issue after making a reboot to apply security issue, since that, I cannot update a custom app that I store on a custom registry on the same cloudron server.

I got this error when updating the application with the latest image

2026-04-19T20:26:55.074Z tasks: startTask: 23918 completed. error: {
  message: 'Unable to pull image xxx.xxx.fr/continuous/custom-app:0.0.0-0d7377d9a6a5080ab755d664031a5791fbe98733. registry error: {"reason":"server error","statusCode":500,"json":null}',
  reason: 'Docker Error'
}

But I can pull the image locally without any issue.

I run the support command to find the issue and it's says that the domain dahsboard isn't reachable, but I can access it on my computer.

Here the result of cloudron-support --troubleshoot

Vendor:  Product:
Linux: 6.8.0-110-generic
Ubuntu: noble 24.04
Execution environment: none
none
Processor: Intel(R) Core(TM) i3-2130 CPU @ 3.40GHz
BIOS Intel(R) Core(TM) i3-2130 CPU @ 3.40GHz         To Be Filled By O.E.M. CPU @ 3.4GHz x 4
RAM: 8017040KB
Disk: /dev/sda2        21G
[OK]    node version is correct
[OK]    IPv6 is enabled and public IPv6 address is working
[OK]    docker is running
[OK]    docker version is correct
[OK]    MySQL is running
[WARN]  netplan configuration is empty. this might be OK depending on your networking setup
[OK]    DNS is resolving via systemd-resolved
[OK]    unbound is running
[OK]    nginx is running
[OK]    dashboard cert is valid
[OK]    dashboard is reachable via loopback
[OK]    No pending database migrations
[OK]    Service 'mysql' is running and healthy
[OK]    Service 'postgresql' is running and healthy
[WARN]  Service 'mongodb' is not running (may be lazy-stopped)
[OK]    Service 'mail' is running and healthy
[OK]    Service 'graphite' is running and healthy
[OK]    Service 'sftp' is running and healthy
[OK]    box v9.1.6 is running
[FAIL]  Could not load dashboard domain.
Hairpin NAT is not working. Please check if your router supports it

If you have any idea how I can fix it, I'm all ears.

[robi]

There are a couple of other people that ran into this, so check those posts.

I believe they updated Ubuntu to resolve.

[james]

Hello @mathieuepitech

What provider are you using to host your server?

[mathieuepitech]

@james I’m on Kimsufi dedicated server.
I don’t know if it’s relevant, but my cloudron server is old, I started it on ubuntu 16 and upgrade it to 24 a few years ago.

[mathieuepitech]

@robi I’m already on the latest LTS Ubuntu version.
Do you have some links of other issues, I didn’t find them with the search.