Ok, I uncommented the two lines in ipn.php debug section.

All payments up to now were done using iDeal.

If I remember well, I switched to api 2.x on December 24th.

Hi,

Yes, the error is reproducable. It occurred again yesterday and today. Some payments are fine, but sometimes it throws an error.

>>ERROR – CRITICAL: 30007 | order not found using order id
WPDB LAST QUERY (*might* be related): SELECT * FROM wp_wppizza_orders WHERE id=3689 AND payment_status IN (‘COMPLETED’)
<<

There is indeed a block on the site using the IQ Block Country plugin. Only allowing connections from Belgium, Netherlands, Germany, Ireland, UK, USA. This was done to prevent attacks.

I have now deactivated that plugin for the time being. However, it has been running with the block for years without problem. And still, most payments are ok.

Over the last week, it seems like there are multiple connections attempts from Ukraine targeting the xmlrpc.php putting a load on the server. However, the timestamps do not correspond with the payment errors.

I have sent you the requested files.