The {0} {1}' has an invalid TablixCorner. The combined RowSpans of the TablixCornerCells within the Column at index: {3} ...

The {0} ‘{1}' has an invalid TablixCorner. The combined RowSpans of the TablixCornerCells within the Column at index: {3} does not equal the number of TablixHierarchyColumns with TablixMembers containing TablixHeaders.