Problem with converting datapack folder to .Zip file.

I'm having a problem with converting the file of my datapack in a .zip file so I can publish it on planet Minecraft. the problem is that the datapack works fine when it's a folder, but it does not work at all once, I turn it into a .zip file. It won't go in in the datapack section in the create world part and once I drag it into the datapack section of the files and play it does not work ether. It looks like its a problem with the metadata.