Interior of own MLO wont show up on server

[Bizzlike]

Hello first of all together,

I am currently working on my own MLO. This is the second one I have ever started. The first one I had the same problem, but I thought it was because of mistakes I made.
Now I have started a new one, but I have the same error again.

Below I have attached several screenshots.
In Codewalker the interior works without problems, but as soon as it is on a server it is not loaded.

On the server:

If you need any more screenshots or information, just tell me I will upload them.

Greetings
Bizzlike