Fatal error: Uncaught Error: Call to undefined function plugin_dir_path() in /wp-content/plugins/Shopify_data_plugin/vendor/autoload.php:6 Stack trace: #0 /wp-content/plugins/Shopify_data_plugin/install.php(5): require() #1 {main} thrown in /wp-content/plugins/Shopify_data_plugin/vendor/autoload.php on line 6