Red state after relock the bootloader

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Hi, i need help with My Tecno Spark 6 Go (KE5k), recently have problems with bank apps so i decide to flash stock ROM (firmware) to unroot My phone. Everything good but i wanted to lock bootloader with fastboot flash lock and My phone bootloop on red state and restarts every 5 seconds, i solved with MTKAuthBypassToolV30 rebooting into fastboot and unlocking bootloader again and My phone works.My problem is that I want to relock the bootloader without this problem mentioned above...Read more