dataset_empty_file
What happened
A dataset record is created with the size of the file it is for. A size that is missing or zero is refused when the record is created. The upload flow checks the file first and answers import_empty_file, so this code is the dataset record's own refusal.
What to do
Choose a file that has data in it.
Example
text
This file is empty.The sentence above is what the upload screen shows for an empty file.