Werk #14471: Fix possible AttributeError on report rendering

Komponente Reporting & availability
Titel Fix possible AttributeError on report rendering
Datum 17.08.2022
Checkmk-Editon Checkmk Enterprise (CEE)
Checkmk-Version 2.2.0i1 2.1.0p10 2.0.0p28
Level Kleine Änderung
Klasse Bugfix
Kompatibilität Kompatibel - benötigt kein manuelles Eingreifen

If an availability table with annotation using "Reclassify downtime of this period regard as scheduled downtime" was added to a report, the rendering of the report failed with an error like "AttributeError: 'NoneType' object has no attribute 'read'".

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