People get confused with the ffmpeg installation and start adding things to the ffmpeg CLI breaking the rendering with log entries like:
[20:30:23] [Client thread/INFO]: Starting C:\Users\thiba\OneDrive\DocumenC:\Users\thiba\ApC:\Users\thiba\C:\UsersC:\Users\thiba\AC:\Users\thib with args: -y -f rawvideo -pix_fmt bgra -s 1920x1080 -r 82 -i - -an -c:v libx264 -preset ultrafast -pix_fmt yuv420p "%"
A preset change resets it but a button would be easier for them.