Some errors when i connect to beaglebone black

Hi!

Here is some errors happened when i try to create object for my beaglebone on MATLAB.

My beaglebone is in Debian GNU/Linux 9 with Debian Image 2019-08-03.

>> bbb = beaglebone
Warning: Cannot determine version number of the board. 
> In beaglebone/getBoardRevision (line 1693)
  In beaglebone (line 276) 
Warning: Cannot read the board serial number. 
> In beaglebone/getBoardSerialNumber (line 1704)
  In beaglebone (line 278) 
Index exceeds the number of array elements (0).

Error in beaglebone/getLEDConfiguration (line 1391)
            trigger = ret{1};

Error in beaglebone/getAvailablePeripherals (line 1563)
                obj.LED.(id).Trigger           = obj.getLEDConfiguration(name);

Error in beaglebone (line 289)
            obj = getAvailablePeripherals(obj);

Any advice or help will be highly appreciated!

Zhou