Harness status: Error

Uncaught TypeError: Cannot use 'in' operator to search for 'sensorName' in ProximitySensor

TypeError: Cannot use 'in' operator to search for 'sensorName' in ProximitySensor
    at validate_sensor_data (https://xn--n8j6ds53lwwkrqhv28a.wpt.live/generic-sensor/resources/generic-sensor-helpers.js:70:22)
    at run_generic_sensor_iframe_tests (https://xn--n8j6ds53lwwkrqhv28a.wpt.live/generic-sensor/generic-sensor-iframe-tests.sub.js:27:3)
    at https://xn--n8j6ds53lwwkrqhv28a.wpt.live/proximity/ProximitySensor-iframe-access.https.html:13:1