Like explained in this tutorial , on master control panel I do File-> Flash Programming and reprogram the dongle, which then turns on one more LED on the dongle. But, I still get "No response from master" on MCP. I tried moving the dongle to another USB port and reprogramming it, and also erasing the dongle in nRF Go Studio and reprogramming again using MCP. Nothing worked. I'm using MCP 3.8.0 and running everything on Virtual Box. Any ideas on how to solve this?