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Nagstamon fails to connect to IcingaDB 1.5.0 (KeyError: display name) #1156

@thegooof

Description

@thegooof

Description:
After upgrading IcingaDB to version 1.5.0 from the Ubuntu 24.04.3 repository, Nagstamon can no longer connect to the Icinga instance.
Icinga itself appears to be working normally, but Nagstamon fails with:

KeyError: 'display name'

Nagstamon’s debug log remains empty.

Environment:

OS: Ubuntu 24.04.3

IcingaDB version: 1.5.0 (from Ubuntu repo)

Nagstamon version: ( 3.16.2)

Icinga Web / Icinga 2 version: ((version: r2.15.1-1)

Steps to reproduce:

Upgrade IcingaDB to 1.5.0 using apt.

Restart Icinga services.

Open Nagstamon and attempt to connect to the Icinga server.

Observe the connection failure with KeyError: 'display name'.

Expected behavior:
Nagstamon connects successfully as before the upgrade.

Actual behavior:
Nagstamon throws a KeyError and cannot retrieve data.

Additional information:

Debug logging in Nagstamon does not show useful details (empty log).

Icinga Web and Icinga 2 UI/API appear to work correctly.

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