ERROR: Cannot start new world - Premade world not found

[dalmatheo]

Hello everyone. I want to setup my server using docker because I already have a lot of services on this. I used the dedicated server tool to create a world, then zipped this world, and send it to my server. I then set in my SpaceEngineers-Dedicated.cfg:

Karine

And renamed the save Karine. However, this didn't work. I wonder if I have to create an instance on the space engineers dedicated server tool, or just the save as I did. I find the documentation quite unclear about that. I tried, but I can't figure it out.