Thanks for DM’ing me the URL. It looks like the file is being transferred with gzip compression and is ~900KB when compressed, but when it is uncompressed in your Pack it’s 5MB. The 4MB response limit applies to the uncompressed size.
We have the ability to raise the limit, but each case must be individually evaluated by our engineering team. If you DM me your Pack ID I can bring your request to the team for consideration.