ERR_BLOCKED_BY_CLIENT means your browser or an extension is stopping a website...

https://www.mediafire.com/file/824h32433ybk7zk/pdf-45708-83890.pdf/file

ERR_BLOCKED_BY_CLIENT means your browser or an extension is stopping a website from loading. To fix it, try opening the site in private mode. If it works there, check your browser extensions and disable or whitelist the site if needed