Sometimes when batch printing with PrintNode you might receive the error: Failed to connect to api.printnode.com port 443: Address already in use
To fix this, you can:
Open the Shiptheory Print Client and navigate to the "Settings" Tab and change the HTTP Library to "Requests"
Once this has been done, retry a batch print job.
If this solution does not work, please don't hesitate to contact us at 0117 403 4313 or email us at support@shiptheory.com!