Can not connect to host

Looks like you're using an older version. It's basically the same except I have a dark UI.

So just click on your Site Name and hit the Pencil Icon to edit your settings.

GoDaddy's Root Directory varies by the level & type of hosting you have.

If your plan is on a Linux server with C-Panel, then you should use public_html/.

If you're on a Windows server with Plesk Panel, it's something different.

Finally, under More Options, toggle the Passive FTP switch to ON (selected).  And then hit the TEST button.

Nancy