QBWC1048: QuickBooks Web Connector could not verify the web application server certificate (QuickBooks POS 19.0 + QuickBooks Web Connector 2.1.0.30)

Question

I am trying to sync my OpenCart inventory with a QuickBooks POS module via the QuickBooks Web Connector. The documentation says to only use Web Connector version 2.1.0.30 for QB POS. I install the Web Connector on the computer running QB POS 19.0. When I try to add an application I get an immediate QBWC1048 error. Here is the full log output with certain redactions:

20211010.14:08:00 UTC : QWCReader.ParseQWC() : Contents of QWC file: -
<QBWCXML>
<AppName>OpenCart + QBPOS</AppName>
<AppID>id</AppID>
<CertURL>https://fitsfashions.com</CertURL>
<AppURL>https://fitsfashions.com/index.php?route=account/qbposwc</AppURL>
<AppDescription>OpenCart + QBPOS</AppDescription>
<AppSupport>https://fitsfashions.com/index.php?route=information/contact</AppSupport>
<UserName>username</UserName>
<OwnerID>{a60d1e19-bfbb-5b94-e1a8-a34570dc1ed9}</OwnerID>
<FileID>{081bcf7f-6f6a-70c4-0935-cd28bfc05603}</FileID>
<QBType>QBPOS</QBType>
<Notify>false</Notify>
<Scheduler>
<RunEveryNMinutes>5</RunEveryNMinutes>
</Scheduler>
<IsReadOnly>false</IsReadOnly>
</QBWCXML>
20211010.14:08:00 UTC : QBWebConnector.WebServiceManager.ReadQWC(QWCReader QWC) : Parsing application configuration xml file to load its content to variables
20211010.14:08:00 UTC : : QBWC1048: QuickBooks Web Connector could not verify the web application server certificate.


Certificate URL: https://fitsfashions.comStackTrace:
at System.Net.HttpWebRequest.GetResponse()
at QBWebConnector.QWCReader.CheckCertURL()

Message (description of the exception):
The request was aborted: Could not create SSL/TLS secure channel.

Source (name of application or object that caused the exception):
System

TargetSite (method that threw the exception):
System.Net.WebResponse GetResponse()

InnerException:

 

20211010.14:08:01 UTC : QBWebConnector.WebServiceManager.ReadQWC(QWCReader QWC) : QBWC1048: QuickBooks Web Connector could not verify the web application server certificate.

QBWC1051: The new application was not added

As you can see, I've tried adding the CertURL option with no luck. I also get the same error while running the troubleshooter .qwc file from https://test.developer.intuit.com/QBWC/TroubleshootQBWC/index.aspx. I've looked all over the internet and put in help tickets but somehow no one seems to have a working solution other than the CertURL thing. The website uses a valid cPanel v3 certificate. Please advise.

Answer 1

According to Intuit's documentation ( https://developer.intuit.com/app/developer/qbdesktop/docs/get-started/get-started-with-quickbooks-web-connector ) Web Connector version 2.1.0.30 supports these TLS versions:

• support up to TLS 1.0

But your web server doesn't support that old version of TLS:

SSL v2  not offered
SSL v3  not offered
TLS 1.0 not offered
TLS 1.1 is not offered
TLS 1.2 offered
TLS 1.3 offered with final 

This is good, because TLS 1.0 is insecure, and should not be used.

You probably want to upgrade to a newer version of the Web Connector, which supports newer versions of TLS:

• https://developer.intuit.com/app/developer/qbdesktop/docs/get-started/get-started-with-quickbooks-web-connector#download-and-install-the-quickbooks-web-connector