$30, $31 and $32 are right.
More about that here if you like:
I’d like to know which version of GRBL is mentioned in the Console window when LightBurn first connects. You can copy info from the Console window into a Reply here.
Some early versions of GRBL used a different pin choice. The other possibility is the PWM laser control signal is inverted.
Did you flash or configure your firmware?
Is this a packaged build?
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