Fatal error: Uncaught Error: Call to a member function get_charset_collate() on null in /home/refref/public_html/wp-post-to-pdf-enhanced-cache-20250414195233/wp-post-to-pdf-enhanced-cache/includes/schema.php:23 Stack trace: #0 {main} thrown in /home/refref/public_html/wp-post-to-pdf-enhanced-cache-20250414195233/wp-post-to-pdf-enhanced-cache/includes/schema.php on line 23