Error TLS MQTT (Rabbitmq)

[Le Anh]

Hi, i have a issuae, a config rabbitmq with /etc/rabbitmq/rabbit.conf and a add plugin mqtt,
In rabbitmq.conf i config:

mqtt.listeners.tcp.1 = 8883

mqtt.listeners.tcp.default = 1883

ssl_options.cacertfile = /etc/rabbitmq/tls-gen/basic/result/ca_certificate.pem
ssl_options.certfile = /etc/rabbitmq/tls-gen/basic/result/server_certificate>
ssl_options.keyfile = /etc/rabbitmq/tls-gen/basic/result/server_key.pem

ssl_options.verify = verify_peer
ssl_options.fail_if_no_peer_cert = true

i want to use tls mqtt in port 8883
But in client i use MQTTBox and MQTTfx, i cant connect to server MQTT (Rabbitmq - port 8883)
Can U help me about that!
In my server i add : ca_certificate.pem, client_