The command line updater failed (Debian) with this error: "Something failed trying to connect to the device." After this step: "Connecting to the device to get it's information, please wait."
Also saw this error message:
"Exception: Failed to connect to ESP32: Timed out waiting for packet header, on line 351"
With the gui version everything worked fine. I had to install python-qt4 to get the gui version working.