Zend certified PHP/Magento developer

Class contains 1 abstract method

During the install module we get issue:

Compilation was started.
Proxies code generation... 0/7 [>---------------------------]   0% < 1 sec 34.0                                                                                                              Proxies code generation... 1/7 [====>-----------------------]  14% < 1 sec 36.0                                                                                                              Repositories code generation... 1/7 [====>-----------------------]  14% < 1 sec                                                                                                              36.0 MiBPHP Fatal error:  Class DotpayPaymentHelperDataNotification contains                                                                                                              1 abstract method and must therefore be declared abstract or implement the rema                                                                                                             ining methods (DotpayProviderNotificationProviderInterface::getCreditCard) in                                                                                                              /home/czasowe/domains/gerris.pl/public_html/vendor/dotpay/magento2-payment/Helpe                                                                                                             r/Data/Notification.php on line 27

Fatal error: Class DotpayPaymentHelperDataNotification contains 1 abstract m ethod and must therefore be declared abstract or implement the remaining methods (DotpayProviderNotificationProviderInterface::getCreditCard) in /home/czasowe /domains/gerris.pl/public_html/vendor/dotpay/magento2-payment/Helper/Data/Notifi cation.php on line 27

Does anyone know how to solve it?