I am trying to make this tutorial http://optique-project.eu/training-programme/module-ontop/
In this step
Import mappings: Ontop>>Import R2RML mappings… <northwind-mapping-M2T2.ttl >
I am waiting more than a hour and no result. This is what it is. And I have no idea whta can I do. 
The problem comes with the import of mappings.