Warning: mysqli_fetch_array() expects parameter 1 to be mysqli_result, boolean given in /home/msmedia/clientes.msmedia.com.mx/pdfF.php on line 12

Fatal error: Uncaught exception 'Exception' with message 'FPDF error: Some data has already been output, can't send PDF file (output started at /home/msmedia/clientes.msmedia.com.mx/pdfF.php:12)' in /home/msmedia/clientes.msmedia.com.mx/fpdf/fpdf.php:271 Stack trace: #0 /home/msmedia/clientes.msmedia.com.mx/fpdf/fpdf.php(1052): FPDF->Error('Some data has a...') #1 /home/msmedia/clientes.msmedia.com.mx/fpdf/fpdf.php(999): FPDF->_checkoutput() #2 /home/msmedia/clientes.msmedia.com.mx/pdfF.php(209): FPDF->Output() #3 {main} thrown in /home/msmedia/clientes.msmedia.com.mx/fpdf/fpdf.php on line 271