I built many Wordpress themes in the past, but now try using MDB Bootstrap to build a new theme.

Am unable to get Bootstrap JS files working correctly with Wordpress.

Using Chrome's developer console, I get the following errors:

bootstrap.min.js?ver=4.9.2:6 Uncaught TypeError: Cannot read property 'fn' of undefined
 at bootstrap.min.js?ver=4.9.2:6
 at bootstrap.min.js?ver=4.9.2:6
 at bootstrap.min.js?ver=4.9.2:6
(anonymous) @ bootstrap.min.js?ver=4.9.2:6
(anonymous) @ bootstrap.min.js?ver=4.9.2:6
(anonymous) @ bootstrap.min.js?ver=4.9.2:6
mdb.min.js?ver=4.9.2:7 Uncaught TypeError: $ is not a function
 at mdb.min.js?ver=4.9.2:7

I read elsewhere that there is a bug with Bootstrap 4 on Wordpress? Does anyone have any insight or remedy?

I implement the Bootstrap css and js in my Wordpress funtions.php

function theme_enqueue_scripts() {
 wp_enqueue_style( 'Font_Awesome', 'https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css' );
 wp_enqueue_style( 'Bootstrap_css', get_template_directory_uri() . '/css/bootstrap.min.css' );
 wp_enqueue_style( 'MDB', get_template_directory_uri() . '/css/mdb.min.css' );
 wp_enqueue_style( 'Style', get_template_directory_uri() . '/style.css' );
 wp_enqueue_script( 'jQuery', get_template_directory_uri() . '/js/jquery-3.2.1.min.js', array(), '3.2.1', true );
 wp_enqueue_script( 'Popper', get_template_directory_uri() . '/js/popper.min.js', array('jquery'));
 wp_enqueue_script( 'Bootstrap', get_template_directory_uri() . '/js/bootstrap.min.js', array('jquery'));
 wp_enqueue_script( 'MDB', get_template_directory_uri() . '/js/mdb.min.js', array('jquery'));
}
add_action( 'wp_enqueue_scripts', 'theme_enqueue_scripts' );