订阅主题，提示Error: Not authorized (Code: 135). Make sure the permissions are correct, and check MQTT broker ACL configuration

[chens]

MQTTX V1.10.1版本，连接上Broker后，
点击“添加订阅”，
添加Topic /A/B，可以成功，
添加Topic /A/C，失败，提示错误：
[2024-08-29 13:50:55] [ERROR] Failed to subscribe: /A/C, Error : Not authorized (Code: 135). Make sure the permissions are correct, and check MQTT broker ACL configuration
请问如何处理？