Web Connector 3181 Error

This is usually cause by QuickBooks having to many records for customers or orders/receipts. Only the Enterprise version of QuickBooks will allow you to have unlimited number of these. Please see this link for further information -
https://community.intuit.com/articles/1019602-maximum-number-of-list-entries-list-limits-and-custom-fields
And also this one -
https://community.intuit.com/questions/990880-error-code-3181

Once you have fixed this issue, you will need to refer to this page to re-download information - http://www.teapplix.com/help/?page_id=801