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.