Why gives Weblogic server lambda expression error in deployment?

Question

I have a Vaadin project which i develop it via java8. I've been trying a deployment with Oracle weblogic 12c server. But I am getting an error like above when I try it via labmda expression. I removed Lambda expression an retried it. Weblogic has been deployed successfully.

How can i resolve this problem? Bytheway the server is remote.

Answer 1

I could not find a specific solution, but I removed weblogicserver 12.1.2 and installed newest version of weblogic server 12.2.1 There is no any problem. I think, it's about weblogic server versions.