I've had a problem with this integration too. Coming from the Calendly end you need a Pro account and a Paypal Business Account - I have both. But the Calendly integration, after logging in to Paypal, gets stuck on a paypal vertification page that asks for basic info like name and address, but never progresses even after all the data is in and the NEXT button submitted. Im waiting for Calendly's team to respond.
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