The maven repository with the RapidMiner components that is needed to build rapidminer-studio seems to be behind a login wall. When I try to access: https://maven.rapidminer.com/content/groups/public/
I get the message: "Access Denied - Please login before attempting further requests.".
This is preventing me from building RapidMiner in eclipse, which in turn does not allow me to develop our extension (RapidProM)
problem seems to be solved now...