Downloading offline maps taking forever, then getting "unexpected end of stream" error
I have bought and installed Locus pro on a Samsung Galaxy S7 and am now trying to download the three included offline maps. One has finally downloaded (Germany, Niedersachsen) but it took many hours. Often, the download would not progress for hours.
Now I am trying to get Nordrhein-Westphalen and Hessen. It downloads to something around maybe 30, 40%, then doesn't move for hours. Then either nothing happens anymore, or I get an "unexpected end of stream" error.
How can I get to the included offline maps, and possibly to more maps that I intend to buy later?
Btw., my internet connection works just fine (with any other stuff), so does the Wifi in the house. There are no major other downloads or any other significant load on either the internet connection or the Wifi.
How can I get to my offline maps?