Hi Marcel, Tapestry 5.7.0 is not a simple drop-in upgrade from 5.6.x and needs manual migration steps. A lot of classes, like Configuration, moved to new packages, to make the Java 9+ module system (partially) possible, and decouple the UI-related parts from the general web-stack.
There's a migration tool available, and the necessary steps are in the release notes https://tapestry.apache.org/release-notes-570.html Hope this helps! Ben On Thu, Feb 25, 2021 at 9:03 AM Marcel Schepers <marcel.schep...@gmail.com> wrote: > Hello, > After upgrading to 5.7.0 I get this error message when trying to run my > development version using Jetty's Maven plugin: > > java.lang.NoClassDefFoundError: org/apache/tapestry5/ioc/Configuration > > Any ideas what needs to be added to what classpath? > > Best, > Marcel >
