Please try this:
1. Select following refer as 2nd video from vitiosing
Download-Agent: select " MTK_AllInOne_DA_onyx_signed.bin
Scatter-loading File: select " MT6893_Android_scatter.txt
Authentication File: select " auth_sv5.auth
2. Click " Download "
3. Make sure that your tablet is Turn off (This is important)
4. Do not press any button key on tablet and then plug the USB connect to PC
5. The software will be run and loading DA 100% then wait until complete
if above still do not work.
- You can try to change port USB on PC
- Replacement from USB-C/USB-C to USB-A/USB-C
- Re-install MTK VCOM driver