This error occurs when you try to test one of the web service methods by using SoapUI. All you need to do is; Check "Add default wsa:To" from WS-A tab as shown below. That is all! Happy coding!
Solution Architect | Umbraco Certified Master | Umbraco MVPx3 | Certified ScrumMaster
"Anyone can cook, but only the fearless can be great." Ratatouille