usbMsgBusEventResume not allowed in state DEV_STATE_DEFAULT_ADDRESSED

I am following qualcomm tutorial. db845c is connected to pc with usb-c cable and micro usb cable. I executed command adb.exe devices and I saw my device. then I executed adb reboot bootloader command. I saw that device rebooted and after that I saw this message

usbMsgBusEventResume not allowed in state DEV_STATE_DEFAULT_ADDRESSED

is that an error. What does it mean ? after that adb devices and fastboot devices return empty. So why this happen ? What should I do now ?