HTTP 451 from unrestricted location

Several users who trade via API through VPS located in the Netherlands started receiving error 451. Checking the server location confirms being in the Netherlands. Could there be any other reasons for getting the error? What is the course of action in this situation? Servers are paid in advance and changing their IP address is not possible.

Hi, which server provider are you with out of interest? I know some users of Google Cloud Platform were having issues with the 451 unavailable error. This is because Google’s servers all resolve to a US-based IP regardless of the advertised location.

This is not a cloud provider. They only have servers in a data center located directly in the Netherlands. Perhaps this error can be caused by traffic routing?