The current skin, http://docs.bernardomg.com/maven/docs-maven-skin/, does not work with version 3.20 or 3.21 of the maven-site-plugin. We should look at other skins or consider submitting a patch for the current skin.

Other skins can be seen at https://maven.apache.org/skins/. Currently most of them do not seem very active, but that might just be because there is not much to do.