ServerRpcManager$RpcInvocationException when clicking on button

Hello,
I’m new to Vaadin, following 9.4.4.(Buffering Forms) , I’m running into this problem when I click on the button:
I’ve read some people have this problem with common-io-1.2,and they recommend to move to 2.2, that didn’t help for me.
Any suggestion?
Thanks!

com.vaadin.server.ServerRpcManager$RpcInvocationException: Unable to invoke method click in com.vaadin.shared.ui.button.ButtonServerRpc at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:170) at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:118) at com.vaadin.server.communication.ServerRpcHandler.handleBurst(ServerRpcHandler.java:214) at com.vaadin.server.communication.ServerRpcHandler.handleRpc(ServerRpcHandler.java:111) at com.vaadin.server.communication.UidlRequestHandler.synchronizedHandleRequest(UidlRequestHandler.java:91) at com.vaadin.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:37) at com.vaadin.server.VaadinService.handleRequest(VaadinService.java:1352) at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:238) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:568) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)

Hi, this is the generic “something went wrong in an event listener” exception; the actual cause is a few getCause() links further. The full stack trace should contain one or more “Caused by” entries - following these should get you to the root of the problem (probably something in your code). If you can’t seem to figure it out, please copypaste the full trace here, as well as the code in your click listener.

Yes, the problem is that I’m not familiar with binder.commit. I think that is the cause of the problem. I posted another thread more specific, thank you!