Main layout not getting introduced

[Derek]

I am unsure what is happening here, but the main-layout is not getting inserted. It's just pulling in the content and leaving all the layout tags in place.

I have the dependency

        <dependency>
            <groupId>nz.net.ultraq.thymeleaf</groupId>
            <artifactId>thymeleaf-layout-dialect</artifactId>
            <version>3.1.0</version>
        </dependency>