Unable to download a video

I have trouble downloading a video generated through API. I'm trying to download it by clicking the Download button in the UI.

datadog-rum.js:1  POST <https://api2.heygen.com/v1/pacific/collaboration/video.download> 404 (Not Found)
datadog-rum.js:1 Transcode download failed: ApiError: Captioned video not available for video ID a84c00ec83114d02bb90d109a0ac21d8. No complete_tts_version_id or caption_video_url found.  
    at pn (request-D6dS8DVF.js:10:15655)  
    at async bn (EditableHeader-mUX9w1KG.js:1:12197)  
    at async download (EditableHeader-mUX9w1KG.js:1:14593)  
    at async Dt (EditableHeader-mUX9w1KG.js:1:18797)