ErrorCode: 2020 - Required Parameter Line is Missing in the Request Default Customer is used. Need to Refresh the Order"
Some product or other information referenced in the transaction has been updated or changed and needs to be synced before posting this record.
Resolution:
1). In Webgility Online navigate to Settings> Accounting> Products> near refresh button, then select “Download from scratch” and then click on the Refresh button.
2). Then it will ask you “Are you sure you want to download items from scratch?” select “Yes” and then wait for the process to complete.
3). This option will download all products and customer information from scratch (when clicked from their respective tabs).
4). Now try to post the order again.
Please feel free to contact Webgility Support if you need further assistance.