intune-portal 1.2604.18-noble crashes on launch with "Builder setup failed: about-dialog.ui:8:1 <object> is not a valid tag here"

TP 20 Reputation points
2026-05-20T01:25:36.2366667+00:00

Environment

  • OS: Ubuntu 24.04 LTS (Noble)
  • intune-portal version: 1.2604.18-noble
  • microsoft-identity-broker version: 3.0.2-noble
  • Desktop: GNOME (Wayland)

Describe the issue

intune-portal crashes immediately on launch before any UI is displayed. The process aborts with a GTK builder error referencing the embedded about-dialog.ui resource.

Steps to reproduce

  1. Install intune-portal 1.2604.18-noble from packages.microsoft.com/ubuntu/24.04/prod
  2. Run intune-portal from terminal

Actual result

2026-05-20 10:30:54  INFO Command line arguments args=PortalArgs { common: CommonArgs { interactive: false, socket_path: "/run/intune/daemon.socket" } } version="1.2604.18"
2026-05-20 10:30:54 ERROR Fatal error: Builder setup failed: <resource>/portal/about-dialog.ui:8:1 <object> is not a valid tag here
Aborted (core dumped)

Expected result

Application launches normally.

Additional context

  • The error occurs on a clean reinstall with purged config — not a leftover state issue.
  • GDK_BACKEND=x11 and LIBGL_ALWAYS_SOFTWARE=1 do not resolve the issue.
  • The binary links against libgtk-3.so.0; GTK 3.24.41 is installed.
  • strings output on the binary includes Could not include resource bundle, suggesting the embedded GLib resource bundle fails to load at runtime.
  • Downgrading to 1.2604.13-noble resolves the issue completely.
Microsoft Security | Intune | Microsoft Intune Linux

4 answers

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  1. Prathista Ilango 1,080 Reputation points Microsoft Employee
    2026-05-27T15:57:08.3166667+00:00

    Hello Everyone,

    Thank you for bringing this to our attention and we apologize for the inconvenience caused.

    The issue has been addressed, and a fix has been released with the 1.2604.19 update.

    If you continue to experience any issues, please feel free to let us know.

    Hope this helps!

    Regards,

    PI

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  2. Edward Kirwin 5 Reputation points
    2026-05-20T14:24:07.7733333+00:00

    22.04 - jammy:
    apt list --installed intune-portal && apt install intune-portal=1.2604.13-jammy -y --allow-downgrades && apt list --installed intune-portal && apt-mark hold intune-portal && apt-mark showhold intune-portal

    24.04 - noble:
    apt list --installed intune-portal && apt install intune-portal=1.2604.13-noble -y --allow-downgrades && apt list --installed intune-portal && apt-mark hold intune-portal && apt-mark showhold intune-portal

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  3. Rakesh Kumar Ranjan 20 Reputation points
    2026-05-20T13:13:32.5333333+00:00

    We are also facing the same issue . How can we downgrade the version ?

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  4. Taz 9,526 Reputation points MVP Volunteer Moderator
    2026-05-20T07:32:26.1733333+00:00

    Hi TP,

    This does not look environment-related. Based on your findings and the fact that 1.2604.13-noble works correctly, this appears to be a regression in 1.2604.18-noble, likely caused by a broken or improperly packaged GTK resource bundle (about-dialog.ui).

    The error: <object> is not a valid tag here

    typically indicates the embedded UI resource is either malformed or not being loaded correctly by GTK Builder at runtime.

    Since the issue reproduces on a clean install and across both Wayland/X11, your workaround of downgrading to 1.2604.13-noble is currently the safest option until Microsoft republishes or fixes the package.

    This would need investigation from the Intune Linux packaging team rather than local troubleshooting.

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    5 people found this answer helpful.
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