Werk #15495: Fix generation of report preview in background job

Component Reporting & availability
Title Fix generation of report preview in background job
Date Jun 9, 2023
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
2.1.0p30 Checkmk Enterprise (CEE), Checkmk MSP (CME)

If you used "Generate report preview in background job" on the report scheduler page, the background job failed with an error like "Exception: content argument must be Text, not bytes".

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