Can you confirm what this should look like as it looks fine to me but I don't know what else I should be looking for.
Is the URL PRefix correct for the site? - YES
Are you using FTP to connect to the testing server? - YES
if your using FTP and testing the connection, that only means that the FTP Host, User Name and Password are correct.
do you have the correct host directory entered? - THIS IS CURRENTLY public_html/