This error indicates that no video or audio file was selected before starting the task.
- Click the "选择视频或音频" button on the main screen and choose the video/audio file you want to translate.
- If you checked the "文件夹" (folder) checkbox, make sure the selected folder contains at least one supported video/audio file.
- After selecting the file, verify the filename/path contains only English letters, numbers, and simple characters (avoid Chinese, spaces, or special symbols).
- Then click "开始" again.
If you have already selected a file and still see this message, please provide the latest log from the logs/ folder (copy about 30 lines from the bottom) for further diagnosis.