When I check the Audit Trail of an Order in Linnworks.Net > Orders > Open Orders > View Orders > History, the following error message is being returned:

Error: Country is not defined.


The following error message can appear upon exporting Orders to ShipStation and is most likely connected to the fact that the Order Country is specified as Unknown. Please ensure that the required Country is present in Linnworks > Settings > Countries. After it will be added, the order would need to be edited and the newly added country would need to be selected from the available country dropdown.