Well, yes. Unfortunately this map server is dead now: http://schreuderelectronics.com/osm/
As for maps I would suggest hoping for https://github.com/rinigus/pure-maps/ to get support for offline Maps on Ubuntu Touch (on SailfishOS this should work). It also uses a newer version of OSMScout while this old app is apparently useless now.
Feel free to use the click built from here if you have usage for it: https://www.iubuntu.cz/apps/osmscout.zubozrout_0.5.6_armhf.click
But for now I've taken the app down from the store
Also, if anyone would like to continue development on this app, feel free