Fix the WordPress memory exhausted error increasing the PHP memory limit
The "Allowed memory size exausted" error is one of the most commons errors in WordPress, but fortunately, it has an easy fix.
Only is needed to increase the WordPress Memory Limit adding the next line in the wp-config.php file.
define( 'WP_MEMORY_LIMIT', '512M' );
For YITH WooCommerce Gift Card, we recommend to have a minimum of 512 Mb to the proper functioning of the plugin features.