Before you reply "It didn't work" in the forums, verify these three things:

If the error persists, you likely need to bypass SLA/DAA.

Newer MediaTek devices (especially Xiaomi, Vivo, and Oppo) have a "Secure Boot" system. They require an to allow the tool to access the DRAM.

Try (if removable) or a hard reboot before connecting.

Flashing custom firmware carries inherent risks including permanent device damage. The author assumes no liability for data loss or bricked devices.