http://code.paulk.fr/article10/orientation-vector-calculation-from-accelerometer-and-magnetometer-sensors-in-android en Free software, programming and stuff Thu, 01 Jan 1970 01:00:00 +0100 PluXml Fatal error : type : 2 message : Trying to access array offset on value of type null file : /core/lib/class.plx.motor.php line : 746 See https://www.php.net/manual/en/errorfunc.constants.php about type of error ============================================================ Drop this plugin now for running PluXml and report to its author !!