Hi,
I am not sure how to approach my problem with an excel file that seems to fall into your negative test cases as it throws the same exception you expect as a test output for this excel file:
https://github.com/dhatim/fastexcel/blob/33bfbd4966cdf68601ec4b751a33218ea38e0818/fastexcel-reader/src/test/resources/invalid/no-workbook-rels.xlsx
Does that mean you simply do not support this kind of file?
I do not mind, but I wonder how to solve it.