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Fatal error: Uncaught Exception: FPDF error: Some data has already been output, can't send PDF file in /var/www/html/appleseedinfo.org/fpdf/fpdf.php:271 Stack trace: #0 /var/www/html/appleseedinfo.org/fpdf/fpdf.php(1070): FPDF->Error() #1 /var/www/html/appleseedinfo.org/fpdf/fpdf.php(999): FPDF->_checkoutput() #2 /var/www/html/appleseedinfo.org/eventPDF.php(468): FPDF->Output() #3 {main} thrown in /var/www/html/appleseedinfo.org/fpdf/fpdf.php on line 271