Problems injecting a mocked interface

[Stephen More]

I made a fork of:
    https://github.com/os890/javase-cdi-ds-project-template/tree/mock-demo
which can be found here:

https://github.com/mores/javase-cdi-ds-project-template/tree/mockingInterface

When I run this test I get:
   injectionTest(org.os890.cdi.test.SimpleMockTest):
org.os890.cdi.template.BeanInterface$$EnhancerByMockitoWithCGLIB$$c23295e6
isn't a supported approach for mocking -> please extend from the original
class.

What is the best way to inject a mocked interface with many methods ?
Any help is appreciated.

-Thanks