nRF9161 DECT NR+ - hello_dect sample issue

Hello,

I am using Zephyr Toolchain v2.9.0 on an nRF9161 custom board. I have updated the modem firmware to mfw-nr+_nrf91x1_1.0.2 and flashed the board with the hello_dect sample. However, the board consistently reboots when it reaches the following line:

if (exit)

return -EIO;

 what could be the issue ?

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