@Bent30 

Follow steps:

https://help.shopify.com/en/manual/payments/paypal/set-up-paypal

And please be sure to enter your correct PayPal email address to accept payment, otherwise, Shopify uses the email address you use for Shopify and that isn’t always your PayPal email address.

 Verify your PayPal account too by linking a bank account and a link debit or credit card to confirm your physical address.