Fatal error: Uncaught Error: Call to undefined function plugin_dir_path() in C:\xampp\htdocs\wp-content\plugins\PDFEmbedder-premium\core\commercial_pdf_embedder.php:8 Stack trace: #0 {main} thrown in C:\xampp\htdocs\wp-content\plugins\PDFEmbedder-premium\core\commercial_pdf_embedder.php on line 8