World Refuses to Upload

[NRGFlare]

So basically, I decided to try and  switch from Aternos to MH. I downloaded the world from Aternos, and it works in singleplayer. Then I tried to upload it to MH, but the file doesn't upload. Once it hits 100% it acts as if I never uploaded the world in the first place. I put it in a .zip file and everything. I've tried /worlds in-game, but it doesn't appear. The file is also under the 500MB limit. Anyone know any fixes? 

Edited January 27, 2021 by NRGFlare
forgot to add detail that may help

[LCabin]

Make sure when you upload your new world to delete your old one and to set the new one as default. In order to set a default world, you must first head over to the Minehut website and start up your server. Once your server has started, you can click the settings tab and go to level name and type in the new default world name. Once you are done, make sure to restart. I assume that you know how to upload worlds, but if you need to know more information about that, you can check the FAQ.