You may have be having some troubles in importing your data from an online store/application through QuickBooks Web Connector.
When this happens, you may use the Intuit Hosted Service for testing purposes to ensure that your QBWC is connecting and working with your third party application/s.
How to troubleshoot the issue:
Note: Successful connection would signify that the QuickBooks Web connector is working properly.
Should you be encountering further connection issue/s with QBWC and your third party apps,
you must address the concern directly to the company that provided the original QWC file and seek further assistance.