I can then search for a direct download link for your specific build.

Usually means the drivers aren't installed correctly or you are using the wrong USB port. Try a USB 2.0 port.

Download and install the MTK VCOM drivers. Without these, the SP Flash Tool will not recognize your tablet when it is turned off. Step 2: Download the Firmware and Tool

The firmware you downloaded is likely not compatible with the version of SP Flash Tool you are using.

These allow your PC to communicate with the MediaTek processor.

To help you find the for your device, could you tell me: