Bug: DDNS-Updater crashes if Shoutrrr can't connect

[MartenBE]

TLDR: If Shoutrrr can't connect, the container crashes. If I restart with the notification service available, it works fine. If I restart with the notification service not available, it crashes.

1. Is this urgent: Yes/No

2. DNS provider(s) you use: DynDNS

3. Program version:

   Running version latest built on 2024-12-24T09:20:36.130Z (commit 78f3061)

4. What are you using to run the container: podman quadlet

5. Extra information (optional)

Logs:

Jul 01 00:18:14 host1 systemd[1481]: Started ddns-updater.service.
Jul 01 00:18:14 host1 systemd-ddns-updater[4052]: ========================================
Jul 01 00:18:14 host1 systemd-ddns-updater[4052]: ========================================
Jul 01 00:18:14 host1 systemd-ddns-updater[4052]: ============= ddns-updater =============
Jul 01 00:18:14 host1 systemd-ddns-updater[4052]: ========================================
Jul 01 00:18:14 host1 systemd-ddns-updater[4052]: =========== Made with ❤️ by ============
Jul 01 00:18:14 host1 systemd-ddns-updater[4052]: ======= https://github.com/qdm12 =======
Jul 01 00:18:14 host1 systemd-ddns-updater[4052]: ========================================
Jul 01 00:18:14 host1 systemd-ddns-updater[4052]: ========================================
Jul 01 00:18:14 host1 systemd-ddns-updater[4052]:
Jul 01 00:18:14 host1 systemd-ddns-updater[4052]: Running version latest built on 2024-12-24T09:20:36.130Z (commit 78f3061)
Jul 01 00:18:14 host1 systemd-ddns-updater[4052]:
Jul 01 00:18:14 host1 systemd-ddns-updater[4052]: 🔧 Need help? ☕ Discussion? https://github.com/qdm12/ddns-updater/discussions/new/choose
Jul 01 00:18:14 host1 systemd-ddns-updater[4052]: 🐛 Bug? ✨ New feature? https://github.com/qdm12/ddns-updater/issues/new/choose
Jul 01 00:18:14 host1 systemd-ddns-updater[4052]: 💻 Email? quentin.mcgaw@gmail.com
Jul 01 00:18:14 host1 systemd-ddns-updater[4052]: 💰 Help me? https://www.paypal.me/qmcgaw https://github.com/sponsors/qdm12
Jul 01 00:18:14 host1 ddns-updater[4024]: 4387e4c10f125ac921b085a9d425158efed5432c94857ad935a7f658736c519d
Jul 01 00:18:14 host1 systemd-ddns-updater[4052]: 2025-07-01T00:18:14+02:00 ERROR settings validation: shoutrrr settings: shoutrrr addresses: error initializing router services: failed to get login flows: got HTTP 502 Bad Gateway
Jul 01 00:18:14 host1 systemd-ddns-updater[4052]: 2025-07-01T00:18:14+02:00 INFO Shutdown successful
Jul 01 00:18:14 host1 podman[4065]: 2025-07-01 00:18:14.786181201 +0200 CEST m=+0.037075035 container died 4387e4c10f125ac921b085a9d425158efed5432c94857ad935a7f658736c519d (image=docker.io/qmcgaw/ddns-updater:latest, name=systemd-ddns-updater, org.opencontainers.image.url=https://github.com/qdm12/ddns-updater, org.opencontainers.image.version=latest, org.opencontainers.image.authors=quentin.mcgaw@gmail.com, org.opencontainers.image.description=Container to update DNS records periodically with WebUI for many DNS providers, org.opencontainers.image.revision=78f30614b1d085ef6bfbfce92b0e45ca0204f42a, org.opencontainers.image.source=https://github.com/qdm12/ddns-updater, org.opencontainers.image.title=ddns-updater, PODMAN_SYSTEMD_UNIT=ddns-updater.service, io.containers.autoupdate=registry, org.opencontainers.image.documentation=https://github.com/qdm12/ddns-updater, org.opencontainers.image.licenses=MIT, org.opencontainers.image.created=2024-12-24T09:20:36.130Z)
Jul 01 00:18:15 host1 podman[4065]: 2025-07-01 00:18:15.100395651 +0200 CEST m=+0.351289484 container remove 4387e4c10f125ac921b085a9d425158efed5432c94857ad935a7f658736c519d (image=docker.io/qmcgaw/ddns-updater:latest, name=systemd-ddns-updater, org.opencontainers.image.title=ddns-updater, org.opencontainers.image.url=https://github.com/qdm12/ddns-updater, org.opencontainers.image.documentation=https://github.com/qdm12/ddns-updater, org.opencontainers.image.revision=78f30614b1d085ef6bfbfce92b0e45ca0204f42a, org.opencontainers.image.source=https://github.com/qdm12/ddns-updater, PODMAN_SYSTEMD_UNIT=ddns-updater.service, org.opencontainers.image.created=2024-12-24T09:20:36.130Z, org.opencontainers.image.licenses=MIT, org.opencontainers.image.authors=quentin.mcgaw@gmail.com, org.opencontainers.image.description=Container to update DNS records periodically with WebUI for many DNS providers, org.opencontainers.image.version=latest, io.containers.autoupdate=registry)
Jul 01 00:18:15 host1 systemd[1481]: ddns-updater.service: Main process exited, code=exited, status=1/FAILURE
Jul 01 00:18:15 host1 systemd[1481]: ddns-updater.service: Failed with result 'exit-code'.

Configuration file (remove your credentials!):

{
    "settings": [
        {
            "provider": "dynu",
            "domain": "*snip*",
            "username": "*snip*",
            "password": "*snip*",
            "ip_version": "ipv4"
        }
    ]
}

Host OS: NixOs