I've had Sony Vegas then Magic Movie Studio for many years. I have just upgraded to the 2026 Premium to get speech to text. However: I follow all the instructions, and all I get when I click on "Start analysis" is "No language found". Have tried over and over again and am very frustrated, I have uploaded the video to websites offering video transcription and they immediately start transcribing the speech in real time.... so there's obviously nothing wrong with the video.

Running on Windows 10 laptop