Sprout E-mail: 400: HTML Content URL Required - Campaign Monitor I'm getting the following error when trying to send a campaign with Campaign Monitor through the Sprout E-mail plugin:

400: HTML Content URL Required


I used the example templates provided by Sprout. The Api connects well (I get the list my subscription list from Campaign Monitor in Sprout). I make a new campaign and I can preview the mail in both html and text. The preview looks fine (just some hardcoded stuff). But when I try to send the mail I keep on bumping on that issue. I figured it had to do something with the template url, so I played around with the setting in the campaign:

Entries of this type have their own URLs 


I tried pointing it to the template (sproutemail/newsletter) or the name of the entry (sproutemail/{slug}), both without any luck.
Had a typo in my template directory.