nrf_cloud/aws_iot: mqtt_connect, error: -104 on asset tracler app v2


I am trying to connect my own mosquito MQTT broker. I created certificates and I uploaded all certs through the LTE Link Monitor. I defined 

CONFIG_AWS_IOT_BROKER_HOST_NAME="" on asset_tracKerV2 project

But I am getting this error. 

[1;31m<err> aws_iot: mqtt_connect, error: -104

[1;31m<err> aws_iot: AWS broker connect failed -104

I tried to connect nrf cloud but I got the same error code.

I checked the certs are correct. when I  run this command I can see the correct communication. 

.\mosquitto_pub.exe --cafile C:\Users\zsen_\OneDrive\Desktop\mosquitto-tst\client\ca.crt --cert C:\Users\zsen_\OneDrive\Desktop\mosquitto-tst\client\client.crt --key C:\Users\zsen_\OneDrive\Desktop\mosquitto-tst\client\client.key -h -p 8883 -t test -m "hello" -I d:sadasdasd:555

Thank you.

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