The plugin generated 225 characters of unexpected output during activation
I solved this issue. Problem was in way I was using register_activation_hook. I loaded TbybInstall along with other classes: /* * Load classes */ require plugin_dir_path( __FILE__ ) . ‘classes/class.PreparedCarts.php’; require plugin_dir_path( __FILE__ ) . ‘classes/class.ReturnOptions.php’; require plugin_dir_path( __FILE__ ) . ‘classes/class.TbybInstall.php’; …and I used register_activation_hook in a way which is more similar to official … Read more