Hi Sir,
My project need LESC & AES-CMAC function, then I enabled below CONFIG in sdk_config.h :
NRF_CRYPTO_BACKEND_MBEDTLS_ENABLED
NRF_CRYPTO_BACKEND_MBEDTLS_ECC_SECP256R1_ENABLED
NRF_BLE_LESC_ENABLED
And the pm_init() returns error code 0x8516.