Hello Elodie and welcome!
We know about the mod being removed from the Steam Workshop (the post directly above yours says so in German
). During testing we noticed that the cabin despawns after a certain amount of time if no player is near it. Also the configuration of the mod messed with other base building features. So currently the mod is removed while its developer Stinkenator is working on a fix. As soon as everything is working as intended we will put it back on our servers.
Thank you for your response 
Great to know the mod isn't abandoned