Question / Problem:
How do I get information why a batch failed input?
Answer / Solution:
In the New user view:
Go to the batch view and click the batch history icon.
In the old Classic admin view:
If you got to the Explore tab and click the magnifying glass at the right of the batch with status Input Failed, you will find information about why the batch failed to input, the original file name, the sender email address and the address it was sent to.