Ensure that you have a stable internet connection and try again. Antivirus or Firewall Settings: Your antivirus or firewall software may have settings that block or interfere with attachment downloads. Temporarily disable these security measures or adjust their settings to allow Gmail to download attachments.
Source : https://www.multcloud.com/tutorials/gmail-failed-to-download-attachment-0121-gc.html
The FreeFileViewer application is slightly slower opening files than Office or Adobe. The GUI is a little generic looking, but other than that, it's a great program. I would still recommend it to anyone that wants to save money on annual licensing fees. Review collected by and hosted on G2.com.
Source : https://www.g2.com/products/freefileviewer/reviews
Navigate to Settings › Advanced › Privacy and Security. Click Site Settings › PDF Documents. Locate the toggle switch next to “Download PDF files instead of automatically opening them in Chrome.
Source : https://www.adobe.com/acrobat/resources/chrome-pdf-viewer.html
Once you have the PDF reader downloaded to your PC, you can open PDFs in three simple steps.Find the PDF you want to open in your Files and double click to open.Select Adobe Acrobat (or whichever reader you downloaded) from the list of available options. ... Click Open.
Source : https://www.adobe.com/acrobat/hub/how-to-read-pdfs-on-pc.html
not-given
Source : https://www.youtube.com/watch?v=uStW240j09g
Cached data might interfere with download behavior. Go to Settings > Privacy and security > Clear browsing data" and select "Cookies and other site data" and "Cached images and files." Click "Clear data."Oct 21
Source : https://support.google.com/chrome/thread/240279398/issues-downlaoding-files-in-chrome?hl=en