Hi Ella,
Thank you for your message. Please review this article to make sure the proper steps were taken to add your planner to their event:
Adding a Planner to a Passkey Event
If they are still experiencing issues, they can call our Passkey Support Team directly with the information provided in the link below:
https://www.cvent.com/en/contact/support
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Megan Clark [Designation]
Assistant Team Lead, Online Community Marketing
Cvent
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