This follows a guide for setting up iWeb.
Open "Site Publishing Settings" in iWeb.
Under "Publish to", select "FTP Server".
Fill in "FTP Server Settings" as directed, with your own values from your creation email.
Article from category FTP
The entered password is known in "Have I Been Pwned", which is a public database of leaked passwords on the internet.
Most likely, you (or someone else) have used the password on another website, which has leaked it, resulting in it no longer being secure.
Enter your password here for more information: https://haveibeenpwned.com/Passwords.
We strongly advice you to choose another password