GA - payment_modification_unavailable

// Fire this dataLayer event when the user is shown a pop-up about an unavailable payment modification.

window.dataLayer = window.dataLayer || [];
  window.dataLayer.push({
   'event': 'payment_modification_unavailable',
   'process': 'rnw',  // Variable value. ID/name of the selected process.
   'item_name': 'item name'  // Variable value - name of the item.
});