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Getting a Incorrect XML error on Loading the JSP page with dhtmlxDataProcessor

Hi I’m Getting a Incorrect XML error on Loading the JSP page with dhtmlxDataProcessor . Since I’m new to PHP scripting I’m not sure how to use this

mygrid.loadXML("dhtmlxDataProcessor/server_code/PHP/get.php");
    
    //init dataprocessor and assign verification function
    //specify server update processor - member of dhtmlxGridDataProcessor library (just check the path) or your own
    myDataProcessor = new dataProcessor("dhtmlxDataProcessor/server_code/PHP/update.php");
    //verify if the value of 2nd column (zero-based numbering is 1) is not empty
    myDataProcessor.setVerificator(1)
    //verify value of 4th column (zero-based numbering is 3) against checkIfNotZero verification function (see it below)
    myDataProcessor.setVerificator(3,checkIfNotZero)
    //you can also specify update mode. Availabel modes are: update automaticaly (cell based, row based) and manual update
    //cell ("cell") based mode means that grid will attempt to update data on server after each editing of cell (on editor closed).
    //row ("row") based mode means that grid will attempt to update data on server when row selection changed or Enter key pressed
    //manual ("off") means that you need to run myDataProcessor.sendData() to begin update process (automatic update off).
    myDataProcessor.setUpdateMode("off");//available values: cell (default), row, off
    //initialize data processor for the grid object (in our case - mygrid)
    myDataProcessor.init(mygrid);

Can you please help me