Add a minimum order message to the cart page in WooCommerce

functions.php

<?php
// add this code to the functions.php file from your child theme

add_action( 'woocommerce_before_cart' , 'wc_minimum_order_amount' );
function wc_minimum_order_amount() {
   // Set this variable to specify a minimum order value
   $minimum = 250;
   $min_passed = true;
   $subtotal =  WC()->cart->get_subtotal();
   if ( $subtotal < $minimum ) {
      $min_passed = false;
      $text = sprintf( 
         __('The minimum order amount of %s has not yet been reached. Your total is currently %s.', 'bootscore-sp'), 
         wc_price( $minimum ), 
         wc_price( $subtotal )
        );
   }
   if (!$min_passed) {
        if( is_cart() ) {
            wc_print_notice( $text , 'notice' );         
        } else {
            wc_add_notice( $text, 'notice' );
        }
    }
}