For a playback or export problem, note your browser version, operating system, source format and the selected export format and dimensions. Keep the original audio file.
Try the original demo first. If it plays but a file does not, try a short WAV or MP3. If MP4 is unavailable, choose WebM. Reduce the canvas size if rendering runs out of resources.
Never share private audio, access tokens or personal browser data in a bug report. The studio does not require them.