This error means you tried to start a task without selecting any video or audio file first.
To fix it:
- Click the "Select audio or video" button in the top-left corner of the main interface.
- Choose the video or audio file you want to process (mp4/mkv/avi/mov/wav/mp3, etc.).
- Once the file appears in the list, click "Start Execution".
If you intended to use a different function (e.g., voice transcription, subtitle translation, or text-to-speech), switch to the corresponding panel on the left side of the window, as those do not require a video selection.
Note: If you are re-translating the same file and want to skip previously generated results, make sure the "Clean generated" checkbox is checked; otherwise, the software may reuse existing data.