Missing start button

[Veerasak (Phosing)]

[Rick (Technical Evangelist)]

I note you show using a DSP Device Profile set to Ruida yet your forum profile states you have a “sculpfun s9”, which is entirely unique. I also note you have turned the ‘Start’ button green (Disabled) in your ‘Device Settings’. Flip that off (red), then restart LightBurn to have the UI update and show ‘Start’ in the ‘Laser’ window.