I’m very sorry for the inconvenience. Please tell me the model of your machine. Please confirm the following information:
Charge it for a while before connecting. After powering on, check if there are startup sounds (three beeps in total) and whether the remote control indicator light turns on. If not, the communication cable may be damaged or the machine may be faulty, and you need to contact the merchant for maintenance. If everything is normal, uninstall the app and reinstall it.