when I try to use the 'sum' function with phpspreadsheet, the output returns with '@'. The logical sequence works correctly (therefore the cells with which to add the sum are correct). SEE IMAGEcorrect). SEE IMAGEVEDERE IMMAGINE.
INPUT:
$spreadsheet->getActiveSheet()->setCellValue('E' . $row, '=SOMMA(E4:E' . $row_1 . ')');
OUTPUT: