This error can be repicated by copying a HierarchySlicer component from one page to another. When prompted to Sync the slicer across pages or not, choosing "Yes" will result in the error. The compo...
SQLMonger ,
Actually , in some reports, I can reproduce your error, in some reports, everything works well.
The HierarchySlicer custom visual is developed by Jan Pieter Posthuma, based on his blog, sync Slicers are not yet supported: the custom visuals API is preventing this. I would recommend you contact Jan Pieter Posthuma about the above issue.
Regards,
Lydia