Cyton dongle does not working

I bought a cyton board and tested it for the first time. But the dongle doesn't seem to work. When the dongle is inserted into the PC, after the red led blinks once, the blue LED blinks once and when "AUTO-CONNECT" is selected the following message appears in the OpenBCI GUI (v5.0.9). "Unable ro connect to Cyton. Please check hardware and power source.".(USB Dongle is switched to GPIO 6)
I installed the FTDI driver, and checked the other USB ports. And I have 1 more cyton dongle and this dongle works fine.
The console log is as below.

==> Console log
Console Log Started at Local Time: 2022-03-31_07-46-04
Screen Resolution: 1920 X 1080
High-DPI Screen Detected: false
Operating System: Windows
Welcome to the Processing-based OpenBCI GUI!
For more information, please visit: https://docs.openbci.com/Software/OpenBCISoftware/GUIDocs/
OpenBCI_GUI::Setup: GUI v5 Sample Data exists in Documents folder.
OpenBCI_GUI::Settings: Found and loaded existing GUI-wide Settings from file.
ControlP5 2.3.1 infos, comments, questions at http://www.sojamo.de/libraries/controlP5
TopNav: Internet Connection Not Available
Local GUI Version: v5.0.9
OpenBCI_GUI: AuditoryFeedback: Loading Audio...
OpenBCI_GUI: AuditoryFeedback: Done Loading Audio!
CP: Playback History Size = 1
OpenBCI_GUI::Setup: Setup is complete!
sourceList: click!
OpenBCI_GUI: Channel count set to 8
ControlPanel: Found Cyton Dongle on COM port: COM88

ControlPanel: Attempting to Auto-Connect to Cyton

ControlPanel: Found Cyton Dongle on COM port: COM88
CytonAutoConnect: Error reading from Serial/COM port
[WARN]: Found a Cyton dongle, but could not connect to the board. Auto-Scanning now...
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
CytonAutoConnect: Error reading from Serial/COM port
[ERROR]: Unable to connect to Cyton. Please check hardware and power source.
ConsoleLog: Opening console log as text file!