When I go to ShipStation and Test Connection for the Linnworks Store, the following error message is being returned:
The remote server returned an error: (500) Internal Server Error.
This error may return if the URL is wrong in the URL to Custom XML Page field. Please ensure that it is copied correctly from Linnworks > Shipping > ShipStation > URL to custom XML page. If the information in the URL is correct, ensure that the email and password entered are the Linnworks account holder's ones.
If this error appears during the order import to ShipStation, please review this article instead: Shipping - ShipStation: 500 - Internal server error