<b>QBWC 1085</b> is a common error that occurs in QuickBooks Web Connector, a tool that enables web-based applications to exchange data with QuickBooks Desktop. This error usually indicates a problem with the QBWC file or certificate, and it prevents QuickBooks from establishing a connection with the web-based application. To fix this error, you can try resetting the QBWC file, re-adding the web-based application, or reinstalling the QuickBooks Web Connector. If the problem persists contact QuickBooks support.