animator-addon not working

How does the animator addon work. I used maven to import the addon. I implemented just like the demo page, but it doesn’t work. All it does is give a message:

Widgetset does not contain implementation for org.vaadin.jouni.animator.AnimatorProxy. Check its @ClientWidget mapping, widgetsets GWT module description file and re-compile your widgetset. In case you have downloaded a vaadin add-on package, you might want to refer to add-on instructions. Unrendered UIDL:

how does this addon work?

You haven’t compiled the widgetset. Every time you take a (client side) add-on to your project, you have to compile the widgetset once. The directory has instructions on how to do it, as well as the book of vaadin.

Thanks, but a bit weird since this is the first addon i’ve had to compile.

Book of vaadin

15.3. Compiling Add-on Widget Sets
15.3.1. Compiling Widget Sets in Eclipse

Only weird if the other addons had a client-side implementation… Some addons are server-only, just extending an existing widget for example. But if it has client-side code, it must be compiled because the Java is converted to JavaScript for the browser to use ala GWT.