[TRANSLATIONS] Invalid translations/en.json: Invalid translation key 'servoMixer1', need to be [a-z0-9-_]+ and cannot start or end with a hyphen or underscore. for dictionary value @ data['entity']['sensor']. Got {'boiler_power': {'name': 'Boiler power'}, 'fuel_level': {'name': 'Fuel level'}, 'lambda_status': {'name': 'Lambda status'}, 'lambda_set': {'name': 'Lambda set'}, 'lambda_level': {'name': 'Lambda level'}, 'main_server': {'name': 'Main server'}, 'mode': {'name': 'Boiler mode'}, 'mixer_temp1': {'name': 'Mixer 1 temperature'}, 'mixer_set_temp1': {'name': 'Mixer target temperature'}, 'signal': {'name': 'Signal quality'}, 'servoMixer1': {'name': 'Mixer 1 servo position'}, 'status_wifi': {'name': '...