2022-09-22 16:18:36+0000 [-] [ERROR] [1663863516.460848]: [Client 0] Received a message without an op. All messages require 'op' field with value one of: ['call_service', 'advertise', 'unadvertise', 'publish', 'subscribe', 'unsubscribe', 'fragment', 'advertise_service', 'service_response', 'unadvertise_service']. Original message was: {"action":"connect","host":"ubiquityrobot","port":22,"username":"ubuntu","password":"ubuntu"} 2022-09-22 16:18:36+0000 [-] [INFO] [1663863516.481766]: Client connected. 2 clients total.