Magento 2 - Adyen alternative payment issue

Hello,

Our Magento 2 system (version 2.4.2) uses a one step checkout module made by a company called aheadworks and Adyens magento module for payment.

The issue we are having is that to enable apple pay in the adyen module, you must enable alternative payment methods. To do this we navigate to stores > configuration > sales > payment methods > other payment methods > adyen all in one payment solutions > alternative payment methods.

When enabled the checkout will just continue to load but never finish. This is our error.

When alternative payment methods are disabled checkout and standard Adyen card payment works fine.

Adyen advised that the one step checkout module is the cause, so we need a magento expert to look into this and fix so we can use the alternative payment method (Apple Pay).

The attached uploads show the settings and the loading issue on the checkout.

Please note i need this working in the next few hours (if possible in the next 4 hours i would like this working)