Ensure your device actually uses an MTK processor. Attempting to use this tool on a Qualcomm or Exynos device will not work and could cause damage. Conclusion
A Deep Dive into FlashTool v5.01: The Essential Utility for Mobile Firmware Management flashtoolv501
Never flash a device with less than 50% battery. If the power cuts out mid-flash, the device may become unrecoverable. Ensure your device actually uses an MTK processor