Uncaught Exception: Some data has already been output to browser, can't send PDF file
in /home/h64543/domains/alemohamadlaw.com/public_html/wp-content/plugins/pdf-print/mpdf/mpdf.php on line 9405

Call stack:

1. mPDF::Output()
   wp-content/plugins/pdf-print/pdf-print.php:1429
2. pdfprnt_print(WP)
   wp-includes/class-wp-hook.php:324
3. WP_Hook::apply_filters(NULL, array)
   wp-includes/class-wp-hook.php:348
4. WP_Hook::do_action(array)
   wp-includes/plugin.php:565
5. do_action_ref_array('wp', array)
   wp-includes/class-wp.php:830
6. WP::main('')
   wp-includes/functions.php:1336
7. wp()
   wp-blog-header.php:16
8. require('/home/h64543/domains...l/wp-blog-header.php')
   index.php:17