High voltaje regulator fail VDDH

Question

Hi, im working in a project with the nRF5340-QKAA and I need VDD as output 1.8V, for this reasoin I supply the uC with 3.6V on VDDH like this image:

this works fine, I can read the 1.8V on VDD pins but the uC doesn't run the FW, it give me this error on VS Code when I try to flash it:

In other hand if I suply with 3.6V on all pins VDDH and VDD the uC runs and the FW works fine.

As FW I use the blink example of Nordic with this main:

#include <zephyr/kernel.h>
#include <zephyr/drivers/gpio.h>
#include <hal/nrf_gpio.h>

#define SLEEP_TIME_LEDS   1000
#define SLEEP_TIME_BUZZER 100
#define LED_RED   NRF_GPIO_PIN_MAP(1, 3)
#define LED_GREEN NRF_GPIO_PIN_MAP(0, 8)
#define LED_BLUE  NRF_GPIO_PIN_MAP(0, 9)

#define BUZZER    NRF_GPIO_PIN_MAP(0, 7)

int main(void)
{
	nrf_gpio_cfg_output(LED_RED); //Set pins as output
	nrf_gpio_cfg_output(LED_GREEN);
	nrf_gpio_cfg_output(LED_BLUE);	
	nrf_gpio_cfg_output(BUZZER);		

	while (1) {

		nrf_gpio_pin_set(LED_RED);
		k_msleep(SLEEP_TIME_LEDS);
		nrf_gpio_pin_clear(LED_RED);
		k_msleep(SLEEP_TIME_LEDS);			

		nrf_gpio_pin_set(LED_GREEN);
		k_msleep(SLEEP_TIME_LEDS);
		nrf_gpio_pin_clear(LED_GREEN);
		k_msleep(SLEEP_TIME_LEDS);

		nrf_gpio_pin_set(LED_BLUE);
		k_msleep(SLEEP_TIME_LEDS);
		nrf_gpio_pin_clear(LED_BLUE);
		k_msleep(SLEEP_TIME_LEDS);			

	}
	
}

Any have idea why doesn work the uC whe I only suplly the VDDH pin with 3.6V?