If you received a notification from PayPal that a billing agreement with Facebook was canceled, it is likely that the PayPal was removed from your Facebook account or another account on which your PayPal information was stored.
When you add your PayPal to your Facebook account, PayPal creates a billing agreement that authorizes you to make payments while logged into your Facebook account. Removing the PayPal from your Facebook account will void the billing agreement and remove the ability to make instant purchases on your account.
If you decide to add your PayPal again, a new billing agreement will be created, and you will be able to complete purchases instantly without having to log in to PayPal for each transaction.
When you add your PayPal to your Facebook account, PayPal creates a billing agreement that authorizes you to make payments while logged into your Facebook account. Removing the PayPal from your Facebook account will void the billing agreement and remove the ability to make instant purchases on your account.
If you decide to add your PayPal again, a new billing agreement will be created, and you will be able to complete purchases instantly without having to log in to PayPal for each transaction.