Flashforge Dreamer wont connect after upgrade to 1.8.0

What is the problem?

Flashforge dreamer works perfectly with Octoprint ver 1.7.3. After successfully upgrading to 1.8.0 it wont connect anymore.

What did you already try to solve it?

I reinstalled ver 1.73 and it works, but then tried 1.80 again and it wont connect

Have you tried running in safe mode?

YES

Did running in safe mode solve the problem?

NO

Systeminfo Bundle

Changing monitoring state from "Offline" to "Detecting serial connection"
Performing autodetection with 7 port/baudrate candidates: FlashForge Dreamer 3D Printer, port:1:8@115200, FlashForge Dreamer 3D Printer, port:1:8@250000, FlashForge Dreamer 3D Printer, port:1:8@230400, FlashForge Dreamer 3D Printer, port:1:8@57600, FlashForge Dreamer 3D Printer, port:1:8@38400, FlashForge Dreamer 3D Printer, port:1:8@19200, FlashForge Dreamer 3D Printer, port:1:8@9600
Trying port FlashForge Dreamer 3D Printer, port:1:8, baudrate 115200
Handshake attempt #1 with timeout 2.0s
Connected to: <octoprint_flashforge.flashforge.FlashForge object at 0x6d67e0f0>, starting monitor
Handshake attempt #2 with timeout 2.0s
Handshake attempt #3 with timeout 2.0s
Trying port FlashForge Dreamer 3D Printer, port:1:8, baudrate 250000
Handshake attempt #1 with timeout 2.0s
Handshake attempt #2 with timeout 2.0s
Handshake attempt #3 with timeout 2.0s
Trying port FlashForge Dreamer 3D Printer, port:1:8, baudrate 230400
Handshake attempt #1 with timeout 2.0s
Handshake attempt #2 with timeout 2.0s
Handshake attempt #3 with timeout 2.0s
Trying port FlashForge Dreamer 3D Printer, port:1:8, baudrate 57600
Handshake attempt #1 with timeout 2.0s
Handshake attempt #2 with timeout 2.0s
Handshake attempt #3 with timeout 2.0s
Trying port FlashForge Dreamer 3D Printer, port:1:8, baudrate 38400
Handshake attempt #1 with timeout 2.0s
Handshake attempt #2 with timeout 2.0s
Handshake attempt #3 with timeout 2.0s
Trying port FlashForge Dreamer 3D Printer, port:1:8, baudrate 19200
Handshake attempt #1 with timeout 2.0s
Handshake attempt #2 with timeout 2.0s
Handshake attempt #3 with timeout 2.0s
Trying port FlashForge Dreamer 3D Printer, port:1:8, baudrate 9600
Handshake attempt #1 with timeout 2.0s
Handshake attempt #2 with timeout 2.0s
Handshake attempt #3 with timeout 2.0s
Changing monitoring state from "Detecting serial connection" to "Error"
Changing monitoring state from "Error" to "Offline after error"
Connection closed, closing down monitor

Additional information about your setup

Using an approved power supply for the raspberry Pi
Also removed 5V pin in the USB cable
octoprint-systeminfo-20220912142510.zip (106.2 KB)

Using GitHub - Mrnt/OctoPrint-FlashForge: OctoPrint plugin to support closed source printers from FlashForge, PowerSpec, Dremel plugin

Hello @fbb034

there is this note in the logs:

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

Unable to connect to FlashForge printer - permission error.

If you are using OctoPi/Linux add permission to access this device by editing file:
 /etc/udev/rules.d/99-octoprint.rules

and adding the line:
SUBSYSTEM=="usb", ATTR{idVendor}=="2b71", MODE="0666"

You can do this as follows:
1) Connect to your OctoPi/Octoprint device using ssh
2) Type the following to open a text editor:
sudo nano /etc/udev/rules.d/99-octoprint.rules
3) Add the following line:
SUBSYSTEM=="usb", ATTR{idVendor}=="2b71", MODE="0666"
4) Save the file and close the editor
5) Verify the file permissions are set to "rw-r--r--" by typing:
ls -al /etc/udev/rules.d/99-octoprint.rules
6) Reboot your system for the rule to take effect.

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<