I'm trying to update the content of a free-form landing page. The URL I'm using is
where 1865 is Landing page ID and 1912 is the content ID.
content type: application/x-www-form-urlencoded
and body consists of : type=Image&value=13590
I'm getting an error code 709 and message :
The interplay between templates and content can be complicated. Please submit a support case as that will allow us to look at the specifics of the template, existing content, the exact request and response etc.