PayPal minishop2 ошибка при оплате

/home/u212443042/domains/maisondentremets.com/public_html/core/components/minishop2/custom/payment/paypal.class.php : 84) [miniShop2] Payment error while request. Request: Array
(
    [METHOD] => SetExpressCheckout
    [PAYMENTREQUEST_0_CURRENCYCODE] => GBP
    [PAYMENTREQUEST_0_ITEMAMT] => 4.21
    [PAYMENTREQUEST_0_SHIPPINGAMT] => 10
    [PAYMENTREQUEST_0_AMT] => 14.21
    [RETURNURL] => https://maisondentremets.com/assets/components/minishop2/payment/paypal.php?action=success
    [CANCELURL] => https://maisondentremets.com/assets/components/minishop2/payment/paypal.php?action=cancel
    [PAYMENTREQUEST_0_INVNUM] => 18
    [L_PAYMENTREQUEST_0_NAME0] => Avocado Guacamole
    [L_PAYMENTREQUEST_0_AMT0] => 4.96
    [L_PAYMENTREQUEST_0_QTY0] => 1
    [L_PAYMENTREQUEST_0_NAME1] => Standard (Free)
    [L_PAYMENTREQUEST_0_AMT1] => 0
    [L_PAYMENTREQUEST_0_QTY1] => 1
)
, response: SSL certificate problem: unable to get local issuer certificate

Как можно решить проблему?