Fatal error: Uncaught Exception: TCPDF ERROR: Some data has already been output, can't send PDF file in /var/www/html/admin/vendor/tecnickcom/tcpdf/tcpdf.php:2950 Stack trace: #0 /var/www/html/admin/vendor/tecnickcom/tcpdf/tcpdf.php(7642): TCPDF->Error() #1 /var/www/html/admin/vendor/spipu/html2pdf/src/Html2Pdf.php(575): TCPDF->Output() #2 /var/www/html/admin/overt_aggression_scale_pdf.php(239): Spipu\Html2Pdf\Html2Pdf->output() #3 {main} thrown in /var/www/html/admin/vendor/tecnickcom/tcpdf/tcpdf.php on line 2950