Computer will not connect to laser. Says theLaser is busy or on pause

I ran the Key Chain exercise in the Tutorial successfully. I then changed the name from LightBurn to Ashlie and tried to run it again. I got the error message that says the Laser is Busy or on pause. I can’t figure out how to clear it. I went back to the Lasergrbl software and it will not connect either saying that Access to Com 3 is denied. HELP!

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