Hello Michael,
do not remember if the SD was there , guess yes .
I think that the problem is related to my PC , sometimes also the USB port where the SD reader is connected is not recognized anymore even turning off and on do not solve the problem then the day after it works.
Same thing for the port where the USB cable is connected to the Pixhawk.
the log file you posted shows me that it was going to the nsh console. which only nromally happens if there is no sd card. i mention the buzzer because this would tone to let you know there is an underlying issue.
But is that happens also if the connection is by Sik radio modules ?
Because what made no sense to me was that with radio modules I could connect while with Usb cable no .