Check if there are any Internet connection problems.
Check whether you have installed the Amazon Alexa app onto your smart device and enabled “EufyHome - RoboVac” Skill in the Amazon Alexa app. For details, refer to the “Smart Integrations” page in the EufyHome App.
Make sure you have an EufyHome account and have connected to RoboVac.
Make sure you are using correct Alexa voice-commands.