Fatal error: Uncaught Error: Interface "Espo\Core\MassAction\MassAction" not found in C:\xampp\htdocs\application\Espo\Core\MassAction\Actions\MassConvertCurrency.php:55 Stack trace: #0 {main} thrown in C:\xampp\htdocs\application\Espo\Core\MassAction\Actions\MassConvertCurrency.php on line 55