I checked, the problem is that if you download it from the game content, the game downloads an old wrong version that I corrected,(I don’t understand why)Even if you link here on the site is right ,in the meantime I resolve the problem ,I recommend you to download manually from the repository or minetest forum:
unzip and put in the mod folder
make sure the extracted folder is "CANNABIS_MOD"
and not "cannabis"
As soon as I resolve, I suggest you reinstall the mod directly from the game for future updates I’m going to do, thanks for your patience ,and sorry for the delay in these months I had several personal problems, including the premature loss of my wife :-(