{{ticket.requester.name}} has requested travel to {{ticket.ri_207_cf_where_are_you_going}}, which is on the restricted list.
This error will appear as a System note saying, “Not given.”
The error in this expression is that the second right curly brace is not in bold format. }}
Freshservice support was able to find it; mind you, this was buried in a 50-node workflow.
I believe this is an insight as to how Fresh parses the HTML in expressions. The <\b> tag cut off the second right brace, and so the value was not found.