1. I have replaced both First Name placeholders and the single Next Check In Date with the appropriate Insert Resource -> Contact -> "field". The response looks great, no extra characters, spacing, ... .
2. I have toggled on / off / on ... multiple times with the main Agentforce Agents toggle, leaving it on.
3. I have activated / deactivated / reactivated the template.
4. I have relaunched the dev org from the module.
5. I have let it sit for 15 minutes before checking the challenge.
6. I went through all the steps in the main part (creating the Guest Experience Compensation template) with no issues.
...nothing has worked.
#Trailhead Challenges
The issue was resolved for me with time (overnight) and possibly logging out. Logged back in this morning, toggled the Agentforce Agent again, and all good.