I need basic coding help

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I think you misunderstood what I meant by public_html. It is a folder hosted on your website/server, it is where the files of mysidia adoptables are supposed to be uploaded to. Of course the script itself does not come with a public_html folder, since this folder is reserved for the root directory of your own server.

From the way your ftp looks, you did not enter the ftp host info correctly. I seriously doubt the ftp host is 000webhost.com, it should be something else. You can check this through cpanel's ftp accounts, or simply ask the support staff from 000webhost.