Stuck verifier: “We can’t find the New Guest Newsletter prompt template activated” in locked Einstein AI playground (Org 00DWU00000tgrg9)

Hi Trailblazers—looking for help/escalation on a stuck hands-on verification.

Unit: https://trailhead.salesforce.com/content/learn/projects/quick-start-create-prompt-builder-flex-template/add-a-flow-to-your-prompt-template?trail_id=become-an-agentblazer-innovator-2026 Org ID: 00DWU00000tgrg9 (launched via the unit’s Launch button; org picker is locked) Error: “We can’t find the New Guest Newsletter prompt template activated.”

What exists in the org:

• Template Label: New Guest Newsletter (also tried v2)
• API Name: New_Guest_Newsletter (also _v2)
• Type: Flex | Status: Activated (toggled multiple times)
• Inputs:
  1. Reservation | API: Reservation | Type: Object | Object: External Reservation
  2. Experiences | API: Experiences | Type: Free Text
• Prompt uses only: {{Input.Reservation.External_Guest__r.First_Name__c}} {{Input.Reservation.Check_in_Date__c}} {{Input.Reservation.Check_out_Date__c}} {{Input.Reservation.Room_Type__c}} {{Input.Experiences}}

Tried: delete/empty Recycle Bin, rebuild from scratch, incognito relaunch, full Trailhead/org sign-out/in, session rebinding, alternate label/API name, reactivation toggles. Launch is bound to this org.

Request: Please reset/rebind the verifier for this playground or confirm the exact object/API names the checker expects so I can complete the step.