HA using AWS IoT broker certificate issue

Can anyone help solve this issue?

Invalid config for [mqtt]: not a file for dictionary value @ data[‘mqtt’][‘client_cert’]. Got ‘/home/cert.crt’
not a file for dictionary value @ data[‘mqtt’][‘client_key’]. Got ‘/home/private.key’
not a valid value for dictionary value @ data[‘mqtt’][‘certificate’]. Got ‘/home/rootCA.pem’. (See /config/configuration.yaml, line 44). Please check the docs at https://home-assistant.io/components/mqtt/