Paypal api – paypal is not defined in paypal.Buttons.driver("react", { React, ReactDOM });

I want to develop a PayPal button, and following the API documentation, I have the following code:

import React, {useState}from 'react';
import {useDispatch} from 'react-redux';
import {useHistory} from 'react-router-dom';
import ReactDOM from 'react-dom';

import * as actionsReservations from '../../reservation/actions';
import {Errors} from '..';

const PayPalButton = paypal.Buttons.driver("react", { React, ReactDOM });

const PayPalReserve = ({deposit, menu, companyId, reservationDate, periodType, diners}) => {

    const dispatch = useDispatch();
    const history = useHistory();                                                                                                                                                                     
    const [backendErrors, setBackendErrors] = useState(null);

    const createOrder = (data,actions) => {
        return actions.order.create({
            purchase_units:[
                {
                    amount:{
                        value: deposit
                    },
                },
            ],
        });
    };

    const onApprove = (data, actions) => {
        return actions.order.capture().then(response => {
            dispatch(actionsReservations.reservation(
                menu.id,
                companyId,
                reservationDate,
                periodType,
                diners,
                response.id,
                () => history.push('/reservation/reservation-completed'),
                errors => setBackendErrors(errors)
            ));
            console.log(response);
        });
      }
};

export default PayPalReserve; 

But is throwing me the following error:

Line 9:22:  'paypal' is not defined  no-undef

But if I import paypal from paypal-checkout with this line:

import paypal from 'paypal-checkout';

React throw me the following error:

"TypeError: paypal_checkout__WEBPACK_IMPORTED_MODULE_4___default.a.Buttons is undefined"

My index.html i have this in head tag:

<script defer src="https://www.paypal.com/sdk/js?client-id=MY_CLIENT_CODE"></script>

I dont know why is throwing me these errors when i don’t import paypal-checkout or when I import it. If you knew how to solve it, I would appreciate it

Thanks.