Crash report: Error: No device found in bootloader mode

[tessel-crashbot]

Error: No device found in bootloader mode
    at t2-cli\lib\usb-connection.js:367:19
    at new Promise (<anonymous>)
    at USB.Connection._findBootedDeviceBySerialNumber (t2-cli\lib\usb-connection.js:351:10)
    at Timeout.retry [as _onTimeout] (t2-cli\lib\usb-connection.js:328:12)
    at listOnTimeout (internal/timers.js:549:17)
    at processTimers (internal/timers.js:492:7)

Full report is at -0x6d0829f5c997bb82