Looks like this file was deleted. Here's the error returned from the file database:
Error executing "GetObject" on "https://greektrack-fbla-public.s3.amazonaws.com/files/1/CONCAT%28FBLA%20Connect%20Resources/%2C%20REPLACE%28%60blob%60%2C%20%2C%20%27%27%29%29?response-content-type=application%2Fpdf"; AWS HTTP error: Client error: `GET https://greektrack-fbla-public.s3.amazonaws.com/files/1/CONCAT%28FBLA%20Connect%20Resources/%2C%20REPLACE%28%60blob%60%2C%20%2C%20%27%27%29%29?response-content-type=application%2Fpdf` resulted in a `404 Not Found` response: <?xml version="1.0" encoding="UTF-8"?> <Error><Code>NoSuchKey</Code><Message>The specified key does not exist.</Message> (truncated...) NoSuchKey (client): The specified key does not exist. - <?xml version="1.0" encoding="UTF-8"?> <Error><Code>NoSuchKey</Code><Message>The specified key does not exist.</Message><Key>files/1/CONCAT(FBLA Connect Resources/, REPLACE(`blob`, , ''))</Key><RequestId>E59B6SR0GPNHBJYZ</RequestId><HostId>OuWpb+WXZ1G28BGcWItxVpGQjoF2h10A8UscCxc2JW9wtHaid8F+u0cbyc5xwBENK6BXypObDz0JwW6+ctRHbw==</HostId></Error>