are you trying to import (WooCommerce products, users, or custom posts)? What is the approximate size of your CSV file? Are you using any custom field plugins like ACF or JetEngine?
The WP Ultimate CSV Importer Pro is an excellent plugin for importing CSV files into WordPress. While a nulled version may seem appealing, it's essential to prioritize your website's security and functionality by opting for the regular version. wp ultimate csv importer pro nulled better