When uploading a world, it does not load on the server. [CraftBukkit]

So I recently started making a server on Aternos, and I realized that when uploading custom worlds, they didn't work. When I try to upload a world, it says that it is complete, but when I get on the server and go to the world, it didn't load. The world is a .zip file, and the world is below 100 MB.

I've looked at other threads to see if I could resolve this problem, but I haven't found a answer yet. Any suggestions?

The version of the world matches the version of the server, but it still doesn't work. Is there a minimum world file size?

The File is 15.3 MB. Does that affect anything or not?

I have teleported to the correct coordinates. It still doesn't work.

Quote from Roman

Please upload the map to sth. like dropbox and share post it here.

https://www.dropbox.com/s/lre0…yl/HubLobbySpawn.zip?dl=0

Thienbao, I upload the map, but nothing changes when I log back in. It's just the same map that was there before the upload, but It says the upload was completed.

I'm on mac. I don't have WinRar. Should I just copy all the files inside the world, select them all, then compress them into a zip?

Ok well, I uploaded the world, restarted the server. It got stuck on loading, I waited 5 minutes only to see it go offline, so I started it up again, and now its stuck on loading.

Ok well, the map did upload successfully, but now half my map is cut off (xD). I'm gonna try to upload it again.

Ok, so the map that Thienbao sent me worked, but when I try to compress the world's contents to a zip file, it doesn't work. And I also sent the wrong map file, because the one I sent must've been the broken one (sorry). The correct map file is at https://www.dropbox.com/s/p4r6…4%20%281.12.2%29.zip?dl=0