The initial view is zoomed out too far, so right click on the center
of Bucuresti, and click "zoom in here", twice.
(I think MAYBE it is zoomed out too far because:
The map tries to show all elements in the source osm file.
The source osm file was created by exporting from a smaller area.
But the OSM api exports any object that has a point in the
exported area, so it may include objects that extend
far beyond the exported area. I have not verified this hypothesis.)
The initial view is zoomed out too far, so right click on the center of Bucuresti, and click "zoom in here", twice.