You could try the "manual" way what particel doctor would bundle to get more verbose debugging info
// in Listening Mode (blinking blue)
particel identify
// all the following in DFU Mode (blinking yellow)
particle update
particle keys server
particle keys doctor <yourDeviceIDFromFirstCommand>
particle flash --usb tinker
Post the output of each step
BTW, double posting for the same issue is not appreciated here