kingfluffeh2

I have a world download from a server i ran on 1.16.1, I downloaded the world and it's in a .zip format. It's 20.1MB in size. When I go to upload the world in my panel, it goes through the upload process, but then tells me an error has occurred with no further information as to what that error is. Does the server need to be offline? Is the file too big? I'm not sure what the disconnect is when trying to upload the world.