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Werk #14471: Fix possible AttributeError on report rendering

Component Reporting & availability
Title Fix possible AttributeError on report rendering
Date Aug 17, 2022
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
2.2.0b1 Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT
2.1.0p10 Checkmk Pro, Checkmk Ultimate MT
2.0.0p28 Checkmk Pro, Checkmk Ultimate MT

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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