Uncaught Dinamiko\DKPDF\Vendor\Mpdf\MpdfException: Data has already been sent to output (/app/wordpress/wp-content/plugins/dk-pdf/lib/packages/Mpdf/Tag/BlockTag.php at line 899), unable to output PDF file
in /app/wordpress/wp-content/plugins/dk-pdf/lib/packages/Mpdf/Mpdf.php on line 9572

Call stack:

1. Dinamiko\DKPDF\Vendor\Mpdf\Mpdf::Output('Cumulative impacts.pdf', 'I')
   wp-content/plugins/dk-pdf/includes/dkpdf-functions.php:201
2. dkpdf_output_pdf(WP)
   wp-includes/class-wp-hook.php:341
3. WP_Hook::apply_filters(NULL, array)
   wp-includes/class-wp-hook.php:365
4. WP_Hook::do_action(array)
   wp-includes/plugin.php:570
5. do_action_ref_array('wp', array)
   wp-includes/class-wp.php:838
6. WP::main('')
   wp-includes/functions.php:1343
7. wp()
   wp-blog-header.php:16
8. require('/app/wordpress/wp-blog-header.php')
   index.php:17