I have recently updated the vaadin version from 14.4.4 to 14.10.1 due to https://github.com/vaadin/flow/issues/16905 and now i am facing a new issue in flow-server 2.9.2 in class at line number 244 com.vaadin.flow.component.polymertemplate.TemplateDataAnalyzer.inspectTwoWayBindings(org.jsoup.nodes.Element element).
The exception i am getting java.lang.NoSuchMethodError: 'org.jsoup.nodes.Element org.jsoup.nodes.Element.traverse(org.jsoup.select.NodeVisitor)
I debugeed the code and found out that issue happens at the code as described in the question. But now, I am running out of ideas to fix this.
You could check if you have the JSoup dependency pinned to an older version, or some other dependency that defines an incompatible version. You can use the mvn dependency:tree command to find out which version is used and how it is included.
Vaadin 14.10.1 is tested with version 1.15.3 of JSoup.