Trying to run version 0.9.6 using Vaadin 13.0.13 and get this error:
Caused by: java.lang.UnsupportedClassVersionError: Class com.awesomecontrols.subwindow.SubWindowDesktop has unsupported major or minor version numbers, which are greater than those found in the Java Runtime Environment version 1.8.0_232
Oops. It is because it was compiled with Java 11 and you are using Java 8.
I have change my HDD and reinstalled all may system. Now I’am full J11 and do not have J8.
Please, clone the [github]
(https://github.com/mdre/FlowSubwindow) project and run “gradle build install” in the project root. That will build the component with your Java installed version.