If you receive an "Action failed. Please refresh the page and retry." error message after saving your Table Rate Shipping Plus for WooCommerce settings, this will be due to your server limiting the size of forms that can be submitted.
You should find your server's
php.ini file. Within this file there is a setting called
max_input_vars, this should be increased to at least
5000. Your hosting provider should be able to make this change for you.
If the recommended solution does not work, your hosting provider may be using PHP SUHOSIN. In this case, the following should be pasted into the
.htaccess file of your website:
php_value max_input_vars 5000
php_value suhosin.get.max_vars 5000
php_value suhosin.post.max_vars 5000
php_value suhosin.request.max_vars 5000
If this does not work, you may need to ask your hosting provider to make these changes for you.