Error code 1037 in the QuickBooks Web Connector is the result of the QuickBooks Web Connector running an outdated version.
Cause
The error message QBWC1037 is displayed when the Web Connector is using an outdated version of the software that cannot support your current use. When the software is outdated, it will no longer function and abort all attempts to sync.
Solution
When the error is displayed, there is generally additional text that directs you on the best way to resolve the error. If you need to download a newer version of the QuickBooks Web Connector, you can find all versions on the QuickBooks Help page: https://quickbooks.intuit.com/learn-support/en-us/help-article/install-products/set-quickbooks-web-connector/L4Vp7VI44_US_en_US