Werk #16311: Fix adding of graphs to report via "Add to..."

Component Reporting & availability
Title Fix adding of graphs to report via "Add to..."
Date Jan 23, 2024
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
2.2.0p21 Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

If you added a graph via the burger menu option "Add to report" an error like "Internal error: string indices must be integers, not str" occurred.

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