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.

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If this error appears during the order import to ShipStation, please review this article instead: Shipping - ShipStation: 500 - Internal server error