Error on automation of new user creation

I've been using ADManager Plus to manually upload CSVs of new users each week and let ADM handle the creation. That has worked flawlessly, so I wanted to move towards automation, but I've been getting an error. When I check the execution history, it says: "Unable to raise the request. No results for selected criteria this time. "

I can't find any reason it would not work, as it's been working fine manually. The CSV is formatted the same. Since that error doesn't give any real information, I have no way to tell what's going wrong. And I wasn't able to find anything from searching for that error either.

Any help would be much appreciated!