you for reaching out on the community and telling us about your issue. I do apologize for the issue you're having. I'm wondering what exactly could be causing it to not download anything. Lets try testing in a test file to see if we're able to download in a test file. That'll give us more information to work with. I'll leave instructions down below on how to do so.
Don't use any of these characters: * ? < > | " : \ / (asterisk, question mark, left and right-angle bracket, pipe, straight quotation marks, colon, BACKSLASH, FORWARD SLASH). Also, don't add the .qdf extension; Quicken does that for you.
After adding accounts, see if you are experiencing the same problems in this test file. Once we have more information we'll see what we can try next.