Is the switch under warranty? Have you tried unplugging the switch and then plugging it back in and seeing if it will let you login?
it's not cover by warranty
i did reboot, switch power supply and more.
i did manage eventually to log in. this error is 88/max6639FanSpeedGet(218), and shown again at the log
the switch is working so far, the fan is on all the time on max speed
in the picture bellow, on the top right corner is blink red (blue arrow pointing)
the bottom right is red on all the time. (bellow the blinking red one)