Sync to QuickBooks Desktop stopped working

Anyone else experiencing this problem? Worked fine yesterday (Friday, November 14, 2025). Second time this has happened to us. We're on our knees.

Log file initialized at Friday, November 14, 2025 - 9:53 PM UTC

Timestamp format used: YYYYMMDD.HH:MM:SS UTC

QBWebConnector 2.2 has been initialized with its logging status to level = DEBUG.

Please restart QBWebConnector for any change in log level to take effect. Use file menu to clear log.

20251114.21:53:43 UTC: QBWebConnector.SOAPWebService.do_clientVersion() : *** Calling clientVersion() with following parameter:<productVersion="34.0.10010.76">

20251114.21:53:44 UTC: QBWebConnector.SOAPWebService.updateWS() : Actual error received from web service for clientVersion call: <Client found response content type of 'text/html; charset=UTF-8', but expected 'text/xml'.

The request failed with an empty response.>. For backward compatibility of all webservers, QBWC will catch all errors under app-not-supporting-clientVersion.

20251114.21:53:44 UTC: QBWebConnector.SOAPWebService.do_clientVersion() : This application does not contain support for clientVersion. Allowing update operation for backward compatibility.

20251114.21:53:44 UTC: QBWebConnector.SOAPWebService.do_authenticate() : Authenticating to application 'InflatableOffice QuickBooks Integration App 2025-05-28', username = 'RAHDipesh'

20251114.21:53:44 UTC: QBWebConnector.SOAPWebService.do_authenticate() : *** Calling authenticate() with following parameters:<userName="RAHDipesh"><password=<MaskedForSecurity>

20251114.21:53:44 UTC: QBWebConnector.SOAPWebService.do_authenticate() : QBWC1012: Authentication failed due to following error message.

Client found response content type of 'text/html; charset=UTF-8', but expected 'text/xml'.

The request failed with an empty response.

More info:

StackTrace = at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)

at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)

at QBWebConnector.localhost.WCWebServiceDoc.authenticate(String strUserName, String strPassword)

at QBWebConnector.localhost.WCWebService.authenticate(String strUserName, String strPassword)

at QBWebConnector.SOAPWebService.authenticate(String UserName, String Password)

at QBWebConnector.WebService.do_authenticate(String& ticket, String& companyFileName)

Source = System.Web.Services