GPIO Not working in Nuvoton M487

We are testing RT-Thread on the Nuvoton NuMaker-PFM-M487 board using
Keil V5 IDE for development, we have successfully created test project as below,
compiled it and tested it,
FinSH and msh commands are working,
rt_kprintf("%i: Hello!\n",i) also working but three LEDs are not blinking when we run / debug this program

main.c code file attached:
main.c

Kindly help

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