Werk #13673: Fix "This page was not found" error on werk acknowledge

Component	User interface
Title	Fix "This page was not found" error on werk acknowledge
Date	Mar 15, 2022
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.2.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT 2.1.0b3 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

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