Hi, (I'm Italian so sorry for my English)
I've made a Server with Aternos and I tried several times to upload a CTM map, but, every time, when I start the Server, the world is a random Vanilla! 
My friend has tried, too.
I've done this steps: 1. I click New/Upload button 2. I click Upload and I choose the CTM map (.zip file, 12 MB) 3.I click Upload World button and I wait until it appear a green button with the name of my map 4. I click on it and then i choose the Minecraft Version 5. Finally I start the Server but there is a Vanilla! I also tried to upload other map and to change the order of steps in every way! But it didn't work!
[I copy this from a message that I post on FB some months ago, because there is still the issue!]
Have I done some wrong step? Or it's kind of a Bug in Aternos Website?
CAN'T UPLOAD WORLD
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- English
- NikoPera
- Closed
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whitch minecraft version did you choose?
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Make sure the world doesn't contain any unnecessary files such as temporary MCEdit files.
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Try another zipper and name your map and the world Ordner
World
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It's best to try it with the built-in zip function of your operating system.
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Roman
Closed the thread.