Sad new user: can't get past "error:20 Unsupported or invalid g-code command found in block"

LightBurn Hardware Compatibility Ortur Lasers
13

You have setup your laser with the “iLaser” device type. Edit your device and switch this to “GRBL”.

  1. push “Devices” button in Laser window
  2. select your laser and then click “Edit”
  3. Change your device type and accept other settings

Retest.

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Why the laser only cut tow line in a row