Source repository JBoss Thirdparty Uploads seems to be OK. It contains following directory:

https://repository.jboss.org/nexus/content/groups/developer/org/jboss/seam/embedded/jboss-embedded-api/beta3.SP14

This repository is part of Public Repository Group. When I check the path (link https://repository.jboss.org/nexus/content/groups/public/org/jboss/seam/embedded/jboss-embedded-api/beta3.SP14), I get an error message The server has not found anything matching the request URI

I tried to reindex and regenerate metadata, but it did not help. I also tried to remove repository from the group and add back. When the repository was removed, the folder disappeared from the group repository, when I added it, the folder reappeared, but wihout any content in it.

It is interesting, that the same artifact is also included in Developer Repository Group, but it is there.