QGIS Tutorial: Route Planning in QGIS with the TravelTime QGIS Plugin

Hello, thank you for your tutorial, i found it very useful. I am trying to do the same in Kosovo for waste collection truck routing with the advanced feature, but i get an error 16-We do not support searches in the given area. Make sure that all points for a search are in the same country. Is there anything you can help with? Am i doing something wrong or it only works for UK?