How to launch Rising World on Linux Mint 19

After having downloaded Rising World to my computer, on which I use Linux Mint 19, I couldn't open the game as it first needed to download updates (as usual), but then stopped downloading any updates and suddenly showed up an error-window saying "Some gamefiles are missing. Please update." The only option I've got is to click "OK" in that case. But whenever I click "OK", it does nothing, but closes the Rising World launcher window. Even deleting Rising World, downloading it again and trying it from the beginning didn't help.

Yes I'm using the standalone version (haven't connected it with steam). Whenever I open the launcher now and click on start, it doesn't even start downloading updates. It just gives the error message instead of opening the game and closes itself as soon as I click on "OK".

There might be a general problem with downloading/installing specific programs on Linux Mint 19 Cinnamon as I also couldn't download/install the JDownloader nor Minecraft.

Steam also didn't work out first. But then I found 4 orders in a Linux Forum, which I copied in the Guake Terminal. After I did that, there were no more problems installing Steam.
Those were:

mv ~/.steam/steam/* ~/.local/share/Steam/
rmdir ~/.steam/steam
ln -s ../.local/share/Steam ~/.steam/steam
rm -rf ~/.steam/bin

Would something like that also be possible for Rising World?

Würde jetzt ansonsten eine ältere Version von Linux installieren und es nochmal downloaden und nochmal versuchen. Gibt es eigentlich eine begrenzte Anzahl an Downloads, die man machen kann? Habe nur die Sorge, dass mir das Downloaden verwehrt wird, weil ich es bisher paar Mal versucht habe.

Habe es bei Linux 18.3 jetzt nochmal installiert und es hat geklappt.

Habe nur noch das Problem, dass die untere Leiste (Startleiste) von Linux unten bleibt und nach dem Spielstart nicht verschwindet. Und ich weiß zwar nicht, ob es daran liegt, aber im Spiel kann ich nicht die Konsole öffnen.