it should be working. could be a reference issue? thanks!

Public Function PrintBMRC()

'on error resume next
    Dim wb As Workbook
    Dim slc As Slicer
    Dim slcCache As SlicerCache
    Dim slcItem As SlicerItem
    
    Dim categoryName As String
    Dim fileName As String
    Dim filePath As String
    
    'Set the file path - edit as necessary
    filePath = "C:Temp"
    
    'Get the slicer cache
    'Set wb = ActiveWorkbook
    'Workbooks("2024-04 AMP Dashboard.xlsm")
    'Debug.Print ActiveWorkbook.SlicerCaches(2).Slicers(1).Name
    
    Set slcCache = ActiveWorkbook.SlicerCaches("Slicer_Complex1")
    
    slcCache.ClearManualFilter <ERROR HERE>
    
    'Loop through the slicer's items
    For Each slcItem In slcCache.SlicerItems
        
        'Get the category name
        categoryName = slcItem.Name
        
        'Set the file name
        fileName = categoryName & " - Report " & ".pdf"
        
        'Print the PDF
        slcCache.SlicerItems(categoryName).Selected = True
        ActiveSheet.ExportAsFixedFormat Type:=xlTypePDF, fileName:=filePath & fileName, Quality:=xlQualityStandard
        
        'Deselect the slicer item
        slcCache.SlicerItems(categoryName).Selected = False
    
    Next slcItem
    
End Function

I tried declaring all slicer variables as plain objects but same result. I also know that the SlicerCache captures the object because it shows up with .Name