K40 Laser not responding to Home

My K40 laser is Using a FluidNC board with Lightburn.
When I give home instruction I get the following error message -[MSG:ERR: No homing cycles defined]
I have searched all over the net but find no solution.
I would appreciate it if any member of this forum could throw some light on this.

I would look at the GRBL settings for homing… And a good place to look would be the FluidNC wiki to check that the GRBL setting is hasn’t changed.

for example( https://www.diymachining.com/downloads/GRBL_Settings_Pocket_Guide_Rev_B.pdf )
look at $22, $23, $24, $25, $26, and $27 settings.