Problems with the preview feature can be caused by a couple of factors:

- Internet connection - check it's working properly
- Transcoding - if the upload has just finished it might take our system some time to transcode the audio file. Give it another few minutes.
- Bug - if you checked the above and it's still not working then it might be a bug on our end. If that is the case please contact us by sending a screenshot or a link to the show.