As Basile 5 is notorious for being a fairly large game with lots of files, it can be a big pain for players who don't have the time to download the files via the server.
As a second option, you can download the cache.db -
https://www.dropbox.com/s/uvh0t999q79243m/cache.db?dl=1 containing all the Basile 5 music, sound and texture files critical to gameplay.
Delete your current cache.db in your Blockland folder and replace it with this one to make the server work.
Note that this file is still fairly large. While it may still take long to download, this is definitely a lot faster than the in-game server downloader.Make sure you still have music, sound and texture downloads enabled.