Ensure you have the standard MTK USB VCOM drivers and the libusb-win32 filter driver installed.
to "filter" the MediaTek USB port. This allows the bypass tool to take control of the device connection. Connection: authbypasstoolv6libusb portable
If you are considering downloading a random file named authbypasstoolv6.exe from a forum, understand the risks. Ensure you have the standard MTK USB VCOM