I then added the publication template in one of my delivery templates as seen below:
The issue here is that when i then try to use the input form from within the delivery template to edit the email content, i'm getting the below error:
I can't seem to find anything wrong in my schema/form definitions, both seem to be working fine (individually at least), and although i've worked extensively with Publication Templates in the past, i don't recall experiencing this error before.
Publication template configuration:
Any insight around this would be really appreciated.