Timer doesn't call timer_handler( ) on NRF54L15 DK board

Hi,

When try to use timer based on nrfx (https://github.com/NordicSemiconductor/nrfx/) directly on the nrf54l15 DK board, I found it never call the timer_handler( ).

My code is almost the same as this one: ncs/v2.9.1/modules/hal/nordic/nrfx/samples/src/nrfx_timer/timer/main.c

I tried all of the timers (TIMER00/10/20-24), as has the same behavior.

Where could I be wrong? Thanks.

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