Creation of dynamic property Adyen\Payment\Gateway\Request\RefundDataBuilder\Interceptor::$openInvoiceHelper is deprecated about adyen-magento2

[maaarghk]

@RokPopov @candemiralp ping, this is quite a serious problem but also a very easy one-line fix for you (albeit it should definitely be addressed separately as to why this kind of error of being unable to instantiate a class is not caught by automated testing) - I'm not sure refunds made in the adyen web interface would always trigger a webhook to go and create a creditmemo against the relevant order, so it's unclear whether there is even a workaround.

[candemiralp]

Hello @mhennequet,

Thank you for creating issue. We will provide the fix today.

Best Regards,
Can