Deprecated: substr_count(): Passing null to parameter #1 ($haystack) of type string is deprecated in /data/www/Omeka/export/vendor/mpdf/mpdf/src/Mpdf.php on line 11563

Deprecated: substr_count(): Passing null to parameter #1 ($haystack) of type string is deprecated in /data/www/Omeka/export/vendor/mpdf/mpdf/src/Mpdf.php on line 11563

Deprecated: substr_count(): Passing null to parameter #1 ($haystack) of type string is deprecated in /data/www/Omeka/export/vendor/mpdf/mpdf/src/Mpdf.php on line 11563

Deprecated: Constant FILTER_SANITIZE_STRING is deprecated in /data/www/Omeka/export/pdf.php on line 19

Fatal error: Uncaught ValueError: DOMDocument::loadHTML(): Argument #1 ($source) must not be empty in /data/www/Omeka/export/pdf.php:22 Stack trace: #0 /data/www/Omeka/export/pdf.php(22): DOMDocument->loadHTML() #1 {main} thrown in /data/www/Omeka/export/pdf.php on line 22