We don't know what this error message means.
All we want to do is Sell a webinar through WooCommerce / Zoom webinar, and capture the participants information to Constant Contact. Been trying for days.
We had trouble sending your test through.
[{"code":"300","message":"The parameter is required: phone","description":"Refer to URL: https://zoomappdocs.docs.stoplight.io/zapier"}]


To fix this, you can edit the field "Phone" in Zoom, to make it optional. Right now, the only fields that Zoom displays are "Email", "First Name" and "Last Name". Other fields should be made optional to avoid this issue.
There is no field for "Phone" or "Description"

