Error message 18

My ortur laser master two stopped homing when I plugged it in. When I turned on lightburn and connected it came up with error message 18. that is the alarm I am receiving. I typed in $RST=* nothing happens except the error

here are my settings in Lightburn
Waiting for connection…

Waiting for connection…

Waiting for connection…

Waiting for connection…

Waiting for connection…

[ORIGIN: China]

[PRODUCER: ORTUR]

[AUTHOR: ORTUR]

[MODEL: Ortur Laser Master 2 Pro]

[OLF: 152]

[DATE:22:08:08 - May 16 2021]

[VER:1.1f(STM32F103CB).20210403:]

[OPT:VNMZHSL,15,1024,3]

Target buffer size found

ok

Homing

error:18

$RST=*

[MSG:Restoring defaults]

Ortur Laser Master 2 Pro Ready!

OLF 152.

[MSG:Detecting ambient infrared]

Grbl 1.1f [’$’ for help]

[MSG:’$H’|’$X’ to unlock]

error:18

$x

error:18

[ORIGIN: China]

[PRODUCER: ORTUR]

[AUTHOR: ORTUR]

[MODEL: Ortur Laser Master 2 Pro]

[OLF: 152]

[DATE:22:08:08 - May 16 2021]

[VER:1.1f(STM32F103CB).20210403:]

[OPT:VNMZHSL,15,1024,3]

Target buffer size found

ok

Homing

error:18

[ORIGIN: China]

[PRODUCER: ORTUR]

[AUTHOR: ORTUR]

[MODEL: Ortur Laser Master 2 Pro]

[OLF: 152]

[DATE:22:08:08 - May 16 2021]

[VER:1.1f(STM32F103CB).20210403:]

[OPT:VNMZHSL,15,1024,3]

Target buffer size found

ok

Homing

error:18

$$

$0=5.0

$1=5

$2=0

$3=2

$4=0

$5=7

$6=1

$10=2047

$11=0.050

$12=0.002

$13=0

$14=2

$15=0

$16=1

$17=0

$18=0

$19=0

$20=1

$21=1

$22=43

$23=7

$24=600.000

$25=3000.000

$26=100

$27=3.000

$28=0.100

$29=0.0

$30=1000.

$31=0.

$32=1

$33=1000.000

$34=0.000

$35=0.000

$36=100.000

$37=0

$39=1

$40=1

$41=0

$42=1

$43=1

$44=3

$45=3

$46=0

$56=1.000

$57=1800.000

$58=395.000

$59=6000.000

$60=0

$61=0

$62=0

$63=3

$64=1

$65=0

$261=100

$262=255

$100=80.000

$101=80.000

$102=80.000

$110=10200.000

$111=10200.000

$112=1200.000

$120=2200.000

$121=1800.000

$122=2200.000

$130=400.000

$131=400.000

$132=50.000

ok
$31=0. should that point be there