PPT VBA to Insert Slides via ReUse Slides

I have some code that is giving me a RUn time Error: Slides (unknown member): Failed

It happens on this line:

ActivePresentation.Slides.InsertFromFile Environ$("USERPROFILE") & "\Downloads\" & FileContent & ".pptx", 1, 1, 26

Sub Finish()

Dim URL1 As String
Dim URL2 As String
Dim TextFile As Integer
Dim FilePath As String
Dim FileContent As String
Dim FileDownload As String
Dim i As Long

'File Path of Text File
  FilePath = GetDownloadsPath & "\" & "Category Review BUCategory.txt"
  
'  MsgBox FilePath

'Determine the next file number available for use by the FileOpen function
  TextFile = FreeFile

'Open the text file
  Open FilePath For Input As TextFile
  
 'Store file content inside a variable
  FileContent = Input(LOF(TextFile), TextFile)

'Close Text File
  'Close TextFile
  
'  MsgBox FileContent
  
FileDownload = GetDownloadsPath & "\" & FileContent & ".pptx"

'MsgBox FileDownload


ActivePresentation.Slides.InsertFromFile Environ$("USERPROFILE") & "\Downloads\" & FileContent & ".pptx", 1, 1, 26
    
    'Delete Text File
'    Kill FileDownload

End Sub

My GetDownloadsPath function is:

Function GetDownloadsPath() As String
    
    GetDownloadsPath = Environ$("USERPROFILE") & "\Downloads"

End Function

Any ideas how to correct?

Sure - It would help in future if you reproduced the full error message. The source of the problem likely lies in the length of the file that you're trying to insert. According to your code, you're expecting it to stretch across 26 slides and the error message is telling you that it can't.

It's self-evident that the file you're attempting insert will not span 26 slides, because content of the file is stored in a variable called FileContent which, coincidentallly (?), is also it's own filename (?!?!). So there is a logical error there as well. Any variable containing a string that is suitable as a filename will be far too short to span 26 slides. Equally, any variable containing string that is sufficiently long enough to span 26 slides will far exceed the permissible filename length.