I tested it didn't work but first it was extending ModelBase, then it also didn't work :'(
The error points to line 17 on the server proxy class. You shouldn't put anything in the serverproxy class only in the client proxy class.
I, was already wondering... but it still does not work
I removed
public static ClientProxy client;
and
public void init(){
// EntityRegistry.registerGlobalEntityID(EntityChicken_0.class, "Chicken_0", EntityRegistry.findGlobalUniqueEntityId(), 3515848, 12102);
RenderingRegistry.registerEntityRenderingHandler(EntityChicken_0.class, new RenderChicken_0(new ModelChicken_0(), 1.0F));
}
from ServerProxy.java
And I changed
public static ServerProxy proxy;
and
proxy.init();
to
public static ClientProxy proxy;
and
proxy.registerRenderInformation();
In the ClientProxy already was the "EntityRegistry" part but it still does not work
Error log: