Below are the steps to troubleshoot your issue:

1. Check the version of your browsing software: Make sure that you are using the current version of web browser such as Google Chrome, Firefox, Apple Safari, Microsoft Edge, etc.
2. Update your anti-virus: Ensure that you have the latest version on your computer.
3. Ensure that you have proper internet connection: Test your internet speed and in case of any issue contact your ISP.
4. Check the download process: Check whether a download is in progress or the download process has been interrupted.
5. Check compatibility of the downloader and the files: When downloading files make sure they are not file type corrupt.