Checkmk Werk 15118: Fix adding of content elements "for multiple" to reports

ID: 15118 Title: Fix adding of content elements "for multiple" to reports Component: Reporting & Availability Level: 1 Class: Bug fix Version: 2.2.0i1 Since version 2.1.0 adding of content elements "Host report for multiple hosts" and "Service report for multiple services" to reports was non functional. The content element was not added and no error message was shown.