You are trying to flash an RK3328 firmware onto an RK3399 device. Fix: Verify your device's exact SoC using an app like CPU-Z (if bootable) or check the board's printed text. Download the correct firmware.
That said, if your device uses a Rockchip RK3566 or RK3588, you should seek out the latest series. But for the vast sea of RK3229 TV boxes, RK3288 Chromebooks, and RK3188 tablets – v239 is your digital resuscitation kit. rk android tool v239
The primary function of v2.39 is to write partition images to the device storage (NAND or eMMC). It supports the standard Rockchip update.img format, allowing users to unbrick devices or upgrade to custom ROMs. You are trying to flash an RK3328 firmware