I have configured Day CQ Mail service with my Gmail, that seems to be fine as it is sending emails.
However I have downloaded the EmailDor attachment package and when installed doesn't work. It appears that no process step is selected in the original Workflow UI.
When I have literal values they work, however, trying to combine the data from the form I fill out with the email template, it isn't working. This is how the email appears, I want name and date values to be where I've underlined:
I have downloaded it on two different AEM 6.4 instances, on a AEM 6.4.1 and still have the same error - I'm not sure if this is a bug or if process just needs to be configured in a certain way?