Hi. I'm David, and I'm happy to help you.
This is typically a temporary issue that can arise for various reasons, including potential problems with your internet service provider (ISP).
Try using a different browser.
If you cannot use a different browser, see if the same behavior occurs in an InPrivate/Incognito window.
To open the InPrivate/Incognito window, open the browser and press "Ctrl + Shift + N". (For Microsoft Edge and Google Chrome)
If you still can't download the ISO, try using the Media Creation Tool.
- Download the Media Creation Tool from the link below;
https://go.microsoft.com/fwlink/?linkid=2156295
- Run the tool and click "Accept" to accept the terms;
- In the "Select language and edition" step, uncheck the "Use the recommended options for this PC" box, select the desired language, and click "Next";
- In the "Choose which media to use" step, select "ISO file", click "Next", select where to save, and click "Save".
If you still can't download the ISO, let me know in which language you need the ISO, and I will provide a direct link.
Feel free to ask any questions you may have.