If you see the "error grabbing recruits", it's most likely an issue where WIS screws up the search results. There's a bug where sometimes the same recruit will show up on multiple pages of the search results, when this happens, that means you've completely missed a recruit. The tool recognizes when this happens and tries the search again. Sometimes it'll work the next time, sometimes it won't. The tool retries up to 10 times before giving up and displaying "error grabbing recruits". I never found a good solution around that other than to just keep on trying and eventually it'll work.
You can verify this is the problem you're running into by opening up your log.txt file in the folder with the tool. You will likely see several messages of "Found same player twice on 2 pages of the search"