If you're having trouble uploading podcast artwork to ZenCast for your show or episode, first double-check that your files meet the artwork file type and size requirements.
If everything looks good there, it can be worth trying a quick refresh of your browser page, this often solves most small issues.
And if you've tried that, but you're still unable to upload artwork, note any error message you're seeing (a screenshot is a good idea) and let us know in the chat bubble, and we'll be happy to help.