Paypal Checkout integration question

I am using Paypal Checkout. When setting up, when I complete the sign in, it is telling me that complete authentication via email sent to you. However I do not receive any email from Paypal. I checked my spam etc.

Can you help me with this. I am testing with Sandbox

Please note that PayPal Checkout requires you to have a Business account on PayPal. Hence please check if you have set that up on PayPal and all associated agreements have been signed off.

I would also request you to contact PayPal support regarding the authentication email.