If you encounter difficulty progressing from the "Creating your preview" screen when attempting to view a sent letter, it's likely there's an issue with the letter template used.
Common Template Issue: Missing Curly Braces in Merge Tags
The most frequent problem with templates causing this issue is missing curly braces within merge tags. For example, if a merge tag appears as {{firstName}, it lacks a closing curly brace.
Solution: Ensure Proper Formatting of Merge Tags
Merge tags should consistently have two opening and two closing curly braces. Make sure each merge tag in the template follows this format (e.g., {{firstName}}).