U585/ewf_telemetry_basic_tx_bg96_stmod MQTT connection

I have a problem about CA cert. I've created a device, is being authenticated through a CA Certificate, on Azure IOT Hub. I set EWF_CONFIG_IOT_HUB_HOSTNAME and EWF_CONFIG_IOT_HUB_DEVICEID. and got this problem;

Starting the STMod+ BG96 modem...
Ready!

[SEND][ 3][AT\r]
\n\rV][ 16]\r\nRDY\r\nAT\r\r\nOK\r\n
[SEND][ 3][AT\r]
\n\rV][ 9]AT\r\r\nOK\r\n
[SEND][ 3][AT\r]
\n\rV][ 9]AT\r\r\nOK\r\n
[SEND][ 3][AT\r]
\n\rV][ 9]AT\r\r\nOK\r\n
[SEND][ 5][ATE0\r]
\n\rV][ 11]ATE0\r\r\nOK\r\n
[SEND][ 3][AT\r]
\n\rV][ 6]\r\nOK\r\n
[SEND][ 10][AT+CMEE=1\r]
\n\rV][ 6]\r\nOK\r\n
[SEND][ 11][AT+QISDE=0\r]
\n\rV][ 6]\r\nOK\r\n
[SEND][ 22][AT+QMTCFG=\"ssl\",0,1,2\r]
\n\rV][ 6]\r\nOK\r\n
[SEND][ 24][AT+QMTCFG=\"version\",0,4\r]
\n\rV][ 6]\r\nOK\r\n
[SEND][ 13][AT+QSSLSTATE\r]
\n\rV][ 6]\r\nOK\r\n
[SEND][ 9][AT+CPIN\?\r]
\n\rV][ 33]\r\nAPP RDY\r\n\r\n+CPIN: READY\r\n\r\nOK\r\n
[SEND][ 9][AT+CPIN\?\r]
\n\rV][ 22]\r\n+CPIN: READY\r\n\r\nOK\r\n
[SEND][ 8][AT+CFUN=]

[SEND][ 1][1]

[SEND][ 1][\r]
\n\rV][ 6]\r\nOK\r\n
[SEND][ 9][AT+CFUN\?\r]
\n\rV][ 18]\r\n+CFUN: 1\r\n\r\nOK\r\n
[SEND][ 10][AT+QIACT\?\r]
\n\rV][ 6]\r\nOK\r\n
[SEND][ 23][AT+QSSLCFG=\"cacert\",2,\"]

[SEND][ 16][root_ca_cert.pem]

[SEND][ 2][\"\r]
\n\rV][ 9]\r\nERROR\r\n

ERROR:
[C:/Users/umtky/STM32CubeIDE/workspace_motoSafe/embedded-wireless-framework-main
/embedded-wireless-framework-main/src /ewf_interface.c]:[981]
function: [ewf_interface_verify_response]

Unexpected response: [\r\nERROR\r\n]


ERROR:
[../Core/Src/main.c]:[230]
function: [telemetry_thread_entry]

Failed to init the SSL basic API, ewf_result -3.

What should I do?