Failed to connect Unexpected token '<'

[Asabol]

I just started working on getting my Ender 3 back up and running in the last two days as it has been dormant for some time. I turned it on two days ago and it worked fine and showed that it could still do everything it should. I didn't run any prints as the last time I ran the printer I had an issue of filament clogging the hotend as I have a microswiss all metal hotend. I ran heat cycles on the hotend to be able to disassemble the components look at it on the bench and remove what may still be remaining in the hotend from the last time I printed. After getting so far with doing the process of disassembling I also decided to update the firmware since it has been a while since it was updated. After updating the firmware yesterday I had turned it off as it was showing there were no issues as I wanted to eat lunch. After coming back from lunch to continue working on the printer, I turned it on and it started saying that it was failing connect with the IP of the printer and then also there was an unexpected token '<', ", not showing anything more then that. I also cannot currently get into the printer to look at the comman window to try and fix or resolve the issue. Any help would be awesome, also in this is my current config file for the printer.

; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.5.0-rc.4+1 on Wed May 08 2024 14:16:17 GMT-0400 (Eastern Daylight Time)

; General
G90 ; absolute coordinates
M83 ; relative extruder moves
M550 P"Ender 3" ; set hostname
M911 S19.8 R22 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power loss

; Network
M552 S1 ; configure WiFi adapter
M586 P0 S1 ; configure HTTP

; Smart Drivers
M569 P0 S1 D2 ; driver 0 goes forwards (X axis)
M569 P1 S1 D2 ; driver 1 goes forwards (Y axis)
M569 P2 S0 D2 ; driver 2 goes backwards (Z axis)
M569 P3 S1 D2 ; driver 3 goes forwards (extruder 0)

; Motor Idle Current Reduction
M906 I30 ; set motor current idle factor
M84 S30 ; set motor current idle timeout

; Axes
M584 X0 Y1 Z2 ; set axis mapping
M350 X16 Y16 Z16 I1 ; configure microstepping with interpolation
M906 X800 Y800 Z800 ; set axis driver currents
M92 X80 Y80 Z400 ; configure steps per mm
M208 X0:235 Y0:235 Z0:250 ; set minimum and maximum axis limits
M566 X900 Y900 Z12 ; set maximum instantaneous speed changes (mm/min)
M203 X6000 Y6000 Z180 ; set maximum speeds (mm/min)
M201 X500 Y500 Z20 ; set accelerations (mm/s^2)

; Extruders
M584 E3 ; set extruder mapping
M350 E16 I1 ; configure microstepping with interpolation
M906 E1000 ; set extruder driver currents
M92 E420 ; configure steps per mm
M566 E120 ; set maximum instantaneous speed changes (mm/min)
M203 E3600 ; set maximum speeds (mm/min)
M201 E250 ; set accelerations (mm/s^2)

; Kinematics
M669 K0 ; configure Cartesian kinematics

; Probes
M558 K0 P9 C"^!zprobe.in" H5 F120 T6000 ; configure BLTouch probe via slot #0
G31 P500 X0 Y0 Z0.7 ; set Z probe trigger value, offset and trigger height
M950 S0 C"!zprobe.mod" ; create servo #0 for BLtouch

; Endstops
M574 X1 P"xstop" S1 ; configure X axis endstop
M574 Y1 P"ystop" S1 ; configure Y axis endstop
M574 Z1 S2 ; configure Z axis endstop

; Sensors
M308 S0 P"bedtemp" Y"thermistor" A"Heated Bed" T100000 B4725 C7.06e-8 ; configure sensor #0
M308 S1 P"e0temp" Y"thermistor" A"Nozzle" T100000 B4725 C7.06e-8 ; configure sensor #1

; Heaters
M950 H0 C"bedheat" T0 ; create heater #0
M143 H0 P0 T0 C0 S140 A0 ; configure heater monitor #0 for heater #0
M307 H0 R2.43 D5.5 E1.35 K0.56 B1 ; configure model of heater #0
M950 H1 C"e0heat" T1 ; create heater #1
M143 H1 P0 T1 C0 S285 A0 ; configure heater monitor #0 for heater #1
M307 H1 R2.43 D5.5 E1.35 K0.56 B0 ; configure model of heater #1

; Heated beds
M140 P0 H0 ; configure heated bed #0

; Fans
M950 F0 C"fan0" ; create fan #0
M106 P0 S0 L0 X1 B0.1 ; configure fan #0
M950 F1 C"fan1" ; create fan #1
M106 P1 S0 B0.1 H1 T45 ; configure fan #1

; Tools
M563 P0 D0 H1 F0 ; create tool #0
M568 P0 R0 S0 ; set initial tool #0 active and standby temperatures to 0C

; Miscellaneous
M501 ; load saved parameters from non-volatile memory

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[dc42]

@Asabol please tell us what board, firmware version and Duet Web Control version you are using.

[Asabol]

@dc42 I'm currently using a Duet 2 wifi board running firmware version 3.5.0, and not sure of which version of the Duet Web control I am using.

[Phaedrux]

As you are unable to reach the board via the network connecting by USB terminal will be required. Please go through this guide and let us know what you find along the way for each step.

https://docs.duet3d.com/en/User_manual/Troubleshooting/Duet_wont_respond