Can't upload file

I tried to upload file using Puppeteer but I got this error :

>> Upload Files (PuppeteerUploadFiles) <<

[Executing block Upload Files] Exception: Expected at least 1 elements to be found but 0 were found
BLOCK:PuppeteerOpenBrowser
ENDBLOCK

BLOCK:PuppeteerNewTab
ENDBLOCK

BLOCK:HttpRequest
LABEL:Get
  url = "https://gofile.io/welcome"
  TYPE:STANDARD
  $""
  "application/x-www-form-urlencoded"
ENDBLOCK

BLOCK:PuppeteerUploadFiles
  findBy = XPath
  identifier = "//*[contains(concat( \" \", @class, \" \" ), concat( \" \", \"mb-3\", \" \" ))]"
  filePaths = $["Factures\\20210713031517170GNXXSCCFAEAU13040782\\20210713031517170GNXXSCCFAEAU13040782.pdf"]
ENDBLOCK

I used SelectorGadget’s chrome extension to get the xPath

You have to target the input element, please make sure to use inspect element on the upload button and find the input element with type=“file” in the DOM, and then right click and copy selector (or xpath).