Enabling the "PayPal Reference Transactions" option
To allow the creation of payments by token and recurring payments via PayPal, the merchant must request the activation of the PayPal Reference Transactions option.
This option is enabled manually by your PayPal account manager or through your PayPal customer service: https://www.paypal.com/fr/selfhelp/contact/call
The delay for enabling the option can take from several days to several weeks.