My nrf52840 dongle is not being detected by laptop after being programmed

Respected Sir/Ma'am,

I am developing my Final Year Project using nrf52840 dongle, without DK. For programming, I am using NrfConnect for Desktop. I was testing different programs on my dongle, and I clicked write in nrf connect without resetting the dongle first. I got a pop up that now mcu bootloader will be used to program it, and I realized my mistake, so I clicked cancel, instead of Ok, and reset the dongle with the sideway button. Now my laptop is not detecting the dongle due to some error in dongle, and each time I connect it to laptop, it shows green light and then the error is shown by laptop and the light stops. Then I have to reset it, and reprogram through nrf connect, which is done successfully. After that, the error again emerges, and dongle is not detected. If I reset it and remove it, upon attaching back to laptop, it is not in programmable state, and error emerges. I am totally at a loss here, and I don't have much time.

I will be highly obliged if you can resolve this matter.

Regards,

Hafsa Misbah

1)On inserting, led2 also gives a mixed color blink         2)Here, in a few seconds, not detected

after reset(this reverses on reconnection)  

  a few seconds after programming

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