Online payment is not being applied to an open Order.
On the Order page Anti-Fraud Manager result is
Error: Cannot identify the city the host 188.8.131.52 is located.
Where 184.108.40.206 is the customer's IP address.
The customer was trying to pay his order, he made several unsuccessful tries and was blocked by the Anti-Fraud manager.
Rule The distance between cities exceeds the specified threshold (200.000 mi) was triggered.
Reconfigure Anti-Fraud Plug-ins to suit your security demands.