Werk #17891: Fix "TypeError(base_metric_expression)" when rendering graphs

Component	User interface
Title	Fix "TypeError(base_metric_expression)" when rendering graphs
Date	Apr 2, 2025
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.5.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.4.0b4 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.3.0p31 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT

The Checkmk user interface crashed with the following error when rendering certain graphs:

Cannot calculate graph recipes

Traceback (most recent call last)
...
raise TypeError(base_metric_expression)

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