The size would suggest something is in it. One thing to look at is if the Archive is completely empty. When the script runs it inserts the required number of rows and writes the data. If it fails on the writing part it appears to may have empty rows. I’d test if scrolling through the archive reveals any data.
If still no joy there is an alternative export option mentioned here https://tags.hawksey.info/forums/topic/exporting-archive-problem/#post-310