Configuration of Selections for blogpost does not work (throws exception)

Steps to reproduce:
1) Create a new archetype project
2) Add blog feature
3) rebuild 2x
4) In Essentials go to Tools
5) Select Document type: blogpost
Expected: fields filled in for blogpost
Actual: noting in UI, Exception in console:
[INFO] [talledLocalContainer] 28.04.2015 13:07:52 WARN http-nio-8080-exec-2 [SelectionResource.getSelectionFields:99] Exception trying to retrieve selection fields for document type 'essentialstest:blogpost'
[INFO] [talledLocalContainer] javax.jcr.PathNotFoundException: caption
[INFO] [talledLocalContainer] at org.apache.jackrabbit.core.NodeImpl$11.perform(NodeImpl.java:2265)
[