Return type of Pronamic\WordPress\Pay\Gateways\Adyen\AdditionalData::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Return type of Pronamic\WordPress\Pay\Gateways\Adyen\Amount::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Return type of Pronamic\WordPress\Pay\Gateways\Adyen\ApplicationInfo::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Return type of Pronamic\WordPress\Pay\Gateways\Adyen\BrowserInformation::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Parameter #1 $string of function md5 expects string, string|false given.

Method Pronamic\WordPress\Pay\Gateways\Adyen\Gateway::get_payment_methods() has parameter $args with no value type specified in iterable type array.

Parameter #1 $string of function md5 expects string, string|false given.

Parameter #1 $id of method Pronamic\WordPress\Pay\Core\Gateway::get_payment_method() expects string, string|null given.

Parameter #1 $type of class Pronamic\WordPress\Pay\Gateways\Adyen\PaymentMethodDetails constructor expects string, string|null given.