To run the WP ULike Pro plugin smoothly, please make sure you are running at least WordPress 4.6, PHP 5.6, and MySQL 5.6 or higher. For better performance and efficiency, we recommend using PHP 7+
Recommended PHP Configuration Limits
Many issues that you may run into are all related to restricted configurations on your web server.
The solution is to increase the PHP limits. You can do this on your own, or contact your web host and ask them to increase those limits to a minimum as follows:
max_execution_time = 60
memory_limit = 128M
max_input_vars = 3000