When JDownloader 2 reports that a "final download link did not lead to downloadable content," it typically means the link is either a temporary session URL that expired or a that JDownloader cannot automatically follow Core Causes and Fixes Expired Session Links
// EventScripter script: "On Download Completed" if (link.getFinalURL() && link.getDownloadSize() == 0) link.setEnabled(false); link.setComment("Final link returned no content"); callAPI("dialogs", "showMessageDialog", title: "Invalid final link", message: link.getName() + " - final URL had no downloadable content." ); When JDownloader 2 reports that a "final download
Content-Type: text/html for a binary-expected link.