are installed for the specific chipset (Coolsand, MTK, or Spreadtrum).
Whether you are a professional technician using the Miracle Box (Thunder/2.54) for flashing, unlocking, or repairing IMEI on Android devices, or a novice trying to bypass a factory reset protection (FRP), this error is notorious for halting operations at the worst possible moment.
Ensure you have the correct MTK (MediaTek), Qualcomm, or Coolsand VCOM drivers installed. If the driver is "unsigned," you may need to disable Driver Signature Enforcement in Windows settings to allow it to function. Reconnect the Device: