Create a new (custom) ticket attribute with a few values and sub-values (type: Multi-Tree-Select).
Restart Zammad.
Update a few tickets and select some values of the multi-tree-selection-field.
Create a report profile, which uses the custom attribute as a filter.
Open the reporting menu and select the created report profile.
The error message is shown.
I tried it on the 5.5.0-alpha-Version as well as the stable version 5.4.0 - both versions show this error message. Reports, that don’t use multi-tree-selection-fields as a filter are working fine.
I think this is a bug.
Does anyone know something about this behaviour? Or did I do something wrong while creating the report?