Check out this article if you're interested in learning more about CrowdHandler whitelabel waiting rooms.
  1. Select "Add Rule".
  2. Select "Blank Rule Template"
  3. Name - CrowdHandler Whitelabel Waiting Room
  4. Configure as shown below then save.

Criteria

Add Behaviour - Origin Server

Add Behaviour - Modify Outgoing Request Path

5. Continue to Step 4b - Whitelabel Waiting Room Compression