If you're having trouble uploading your podcast audio file to ZenCast, first double-check that it meets the audio file type 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 and you're still having trouble uploading audio files, take note of any error message you're seeing (a screenshot is a good idea), then get in touch using the chat bubble and we'll be happy to help.