It’s a bit messy because I only left room for initials, but the text fields are
Drawn by:${DRAWN)
Engineering:${ENGINEERING)
Production:${PRODUCTION)
Approved:${APPROVED)
Now I got it to work! I have no idea what I did differently. I tried to see if lower capital letters had to be used for user variables, then it worked. Then I tried capitalized letters again and this worked too…
Edit: I can actually see from the screenshot above that the variables had an extra ) in it, like ${DRAWN)}.